diff --git a/code/__DEFINES/combat.dm b/code/__DEFINES/combat.dm
index e31d2a278e..3664da4a5d 100644
--- a/code/__DEFINES/combat.dm
+++ b/code/__DEFINES/combat.dm
@@ -104,8 +104,7 @@
 #define SHOVE_KNOCKDOWN_HUMAN 30
 #define SHOVE_KNOCKDOWN_TABLE 30
 #define SHOVE_KNOCKDOWN_COLLATERAL 10
-//Shove slowdown
-#define SHOVE_SLOWDOWN_ID "shove_slowdown"
+//for the shove slowdown, see __DEFINES/movespeed_modification.dm
 #define SHOVE_SLOWDOWN_LENGTH 30
 #define SHOVE_SLOWDOWN_STRENGTH 0.85 //multiplier
 //Shove disarming item list
diff --git a/code/__DEFINES/components.dm b/code/__DEFINES/components.dm
index c2482f6fbf..06eb2ff04f 100644
--- a/code/__DEFINES/components.dm
+++ b/code/__DEFINES/components.dm
@@ -231,8 +231,7 @@
 //Mood
 #define COMSIG_ADD_MOOD_EVENT "add_mood" //Called when you send a mood event from anywhere in the code.
 #define COMSIG_CLEAR_MOOD_EVENT "clear_mood" //Called when you clear a mood event from anywhere in the code.
-#define COMSIG_INCREASE_SANITY "decrease_sanity" //Called when you want to increase sanity from anywhere in the code.
-#define COMSIG_DECREASE_SANITY "increase_sanity" //Same as above but to decrease sanity instead.
+#define COMSIG_MODIFY_SANITY "modify_sanity" //Called when you want to increase or decrease sanity from anywhere in the code.
 
 //NTnet
 #define COMSIG_COMPONENT_NTNET_RECEIVE "ntnet_receive"			//called on an object by its NTNET connection component on receive. (sending_id(number), sending_netname(text), data(datum/netdata))
diff --git a/code/__DEFINES/movespeed_modification.dm b/code/__DEFINES/movespeed_modification.dm
index 12a3c331ec..50e1a10fa1 100644
--- a/code/__DEFINES/movespeed_modification.dm
+++ b/code/__DEFINES/movespeed_modification.dm
@@ -1,12 +1,19 @@
 #define MOVESPEED_DATA_INDEX_PRIORITY 1
 #define MOVESPEED_DATA_INDEX_FLAGS 2
 #define MOVESPEED_DATA_INDEX_MULTIPLICATIVE_SLOWDOWN 3
+#define MOVESPEED_DATA_INDEX_MOVETYPE 4
+#define MOVESPEED_DATA_INDEX_BL_MOVETYPE 5
+#define MOVESPEED_DATA_INDEX_CONFLICT 6
 
-#define MOVESPEED_DATA_INDEX_MAX 3
+#define MOVESPEED_DATA_INDEX_MAX 6
 
 //flags
 #define IGNORE_NOSLOW	(1 << 0)
 
+//conflict types
+
+#define MOVE_CONFLICT_JETPACK							"JETPACK"
+
 //ids
 
 #define MOVESPEED_ID_MOB_WALK_RUN_CONFIG_SPEED			"MOB_WALK_RUN"
@@ -16,15 +23,29 @@
 #define MOVESPEED_ID_SLIME_HEALTHMOD					"SLIME_HEALTH_MODIFIER"
 #define MOVESPEED_ID_SLIME_TEMPMOD						"SLIME_TEMPERATURE_MODIFIER"
 
+#define MOVESPEED_ID_SLIME_STATUS						"SLIME_STATUS"
+
+#define MOVESPEED_ID_TARANTULA_WEB						"TARANTULA_WEB"
+
 #define MOVESPEED_ID_LIVING_TURF_SPEEDMOD				"LIVING_TURF_SPEEDMOD"
 
 #define MOVESPEED_ID_CARBON_SOFTCRIT					"CARBON_SOFTCRIT"
 #define MOVESPEED_ID_CARBON_OLDSPEED					"CARBON_DEPRECATED_SPEED"
 
+#define MOVESPEED_ID_DNA_VAULT							"DNA_VAULT"
+
+#define MOVESPEED_ID_YELLOW_ORB							"YELLOW_ORB"
+
+#define MOVESPEED_ID_TARFOOT							"TARFOOT"
+
+#define MOVESPEED_ID_SEPIA								"SEPIA"
+
 #define MOVESPEED_ID_MONKEY_REAGENT_SPEEDMOD			"MONKEY_REAGENT_SPEEDMOD"
 #define MOVESPEED_ID_MONKEY_TEMPERATURE_SPEEDMOD		"MONKEY_TEMPERATURE_SPEEDMOD"
 #define MOVESPEED_ID_MONKEY_HEALTH_SPEEDMOD				"MONKEY_HEALTH_SPEEDMOD"
 
+#define MOVESPEED_ID_CHANGELING_MUSCLES					"CHANGELING_MUSCLES"
+
 #define MOVESPEED_ID_SIMPLEMOB_VARSPEED					"SIMPLEMOB_VARSPEED_MODIFIER"
 #define MOVESPEED_ID_ADMIN_VAREDIT						"ADMIN_VAREDIT_MODIFIER"
 
@@ -32,7 +53,18 @@
 
 #define MOVESPEED_ID_SANITY								"MOOD_SANITY"
 
+#define MOVESPEED_ID_SPECIES							"SPECIES_SPEED_MOD"
+
 #define MOVESPEED_ID_PRONE_DRAGGING                     "PRONE_DRAG"
 #define MOVESPEED_ID_HUMAN_CARRYING                     "HUMAN_CARRY"
 
-#define MOVESPEED_ID_TASED_STATUS						"TASED"
\ No newline at end of file
+#define MOVESPEED_ID_TASED_STATUS						"TASED"
+
+#define MOVESPEED_ID_SLAUGHTER                          "SLAUGHTER"
+
+#define MOVESPEED_ID_CYBER_THRUSTER						"CYBER_IMPLANT_THRUSTER"
+#define MOVESPEED_ID_JETPACK							"JETPACK"
+
+#define MOVESPEED_ID_SHOVE 								"SHOVE"
+
+#define MOVESPEED_ID_MKULTRA							"MKULTRA"
\ No newline at end of file
diff --git a/code/__DEFINES/traits.dm b/code/__DEFINES/traits.dm
index e22dcfbbe0..ef8adfcaf2 100644
--- a/code/__DEFINES/traits.dm
+++ b/code/__DEFINES/traits.dm
@@ -70,8 +70,6 @@
 #define TRAIT_MONKEYLIKE		"monkeylike" //sets IsAdvancedToolUser to FALSE
 #define TRAIT_PACIFISM			"pacifism"
 #define TRAIT_IGNORESLOWDOWN	"ignoreslow"
-#define TRAIT_GOTTAGOFAST		"fast"
-#define TRAIT_GOTTAGOREALLYFAST	"2fast"
 #define TRAIT_DEATHCOMA			"deathcoma" //Causes death-like unconsciousness
 #define TRAIT_FAKEDEATH			"fakedeath" //Makes the owner appear as dead to most forms of medical examination
 #define TRAIT_DISFIGURED		"disfigured"
diff --git a/code/datums/components/mood.dm b/code/datums/components/mood.dm
index eb381af577..2b7c540058 100644
--- a/code/datums/components/mood.dm
+++ b/code/datums/components/mood.dm
@@ -10,7 +10,6 @@
 	var/mood_modifier = 1 //Modifier to allow certain mobs to be less affected by moodlets
 	var/datum/mood_event/list/mood_events = list()
 	var/insanity_effect = 0 //is the owner being punished for low mood? If so, how much?
-	var/holdmyinsanityeffect = 0 //before we edit our sanity lets take a look
 	var/obj/screen/mood/screen_obj
 
 /datum/component/mood/Initialize()
@@ -21,8 +20,7 @@
 
 	RegisterSignal(parent, COMSIG_ADD_MOOD_EVENT, .proc/add_event)
 	RegisterSignal(parent, COMSIG_CLEAR_MOOD_EVENT, .proc/clear_event)
-	RegisterSignal(parent, COMSIG_INCREASE_SANITY, .proc/IncreaseSanity)
-	RegisterSignal(parent, COMSIG_DECREASE_SANITY, .proc/DecreaseSanity)
+	RegisterSignal(parent, COMSIG_MODIFY_SANITY, .proc/modify_sanity)
 
 	RegisterSignal(parent, COMSIG_MOB_HUD_CREATED, .proc/modify_hud)
 	var/mob/living/owner = parent
@@ -131,29 +129,23 @@
 
 	switch(mood_level)
 		if(1)
-			DecreaseSanity(src, 0.2)
+			setSanity(sanity-0.2)
 		if(2)
-			DecreaseSanity(src, 0.125, SANITY_CRAZY)
+			setSanity(sanity-0.125, minimum=SANITY_CRAZY)
 		if(3)
-			DecreaseSanity(src, 0.075, SANITY_UNSTABLE)
+			setSanity(sanity-0.075, minimum=SANITY_UNSTABLE)
 		if(4)
-			DecreaseSanity(src, 0.025, SANITY_DISTURBED)
+			setSanity(sanity-0.025, minimum=SANITY_DISTURBED)
 		if(5)
-			IncreaseSanity(src, 0.1)
+			setSanity(sanity+0.1)
 		if(6)
-			IncreaseSanity(src, 0.15)
+			setSanity(sanity+0.15)
 		if(7)
-			IncreaseSanity(src, 0.20)
+			setSanity(sanity+0.20)
 		if(8)
-			IncreaseSanity(src, 0.25, SANITY_GREAT)
+			setSanity(sanity+0.25, maximum=SANITY_GREAT)
 		if(9)
-			IncreaseSanity(src, 0.4, SANITY_GREAT)
-
-	if(insanity_effect != holdmyinsanityeffect)
-		if(insanity_effect > holdmyinsanityeffect)
-			owner.crit_threshold += (insanity_effect - holdmyinsanityeffect)
-		else
-			owner.crit_threshold -= (holdmyinsanityeffect - insanity_effect)
+			setSanity(sanity+0.4, maximum=SANITY_GREAT)
 
 	if(HAS_TRAIT(owner, TRAIT_DEPRESSION))
 		if(prob(0.05))
@@ -164,8 +156,6 @@
 			add_event(null, "jolly", /datum/mood_event/jolly)
 			clear_event(null, "depression")
 
-	holdmyinsanityeffect = insanity_effect
-
 	HandleNutrition(owner)
 
 /datum/component/mood/proc/setSanity(amount, minimum=SANITY_INSANE, maximum=SANITY_NEUTRAL)//I'm sure bunging this in here will have no negative repercussions.
@@ -187,7 +177,7 @@
 		sanity = amount
 
 	switch(sanity)
-		if(SANITY_INSANE to SANITY_CRAZY)
+		if(-INFINITY to SANITY_CRAZY)
 			setInsanityEffect(MAJOR_INSANITY_PEN)
 			master.add_movespeed_modifier(MOVESPEED_ID_SANITY, TRUE, 100, override=TRUE, multiplicative_slowdown=1.5) //Did we change something ? movetypes is runtiming, movetypes=(~FLYING))
 			sanity_level = 6
@@ -220,31 +210,8 @@
 	master.crit_threshold = (master.crit_threshold - insanity_effect) + newval
 	insanity_effect = newval
 
-/datum/component/mood/proc/DecreaseSanity(datum/source, amount, minimum = SANITY_INSANE)
-	if(sanity < minimum) //This might make KevinZ stop fucking pinging me.
-		IncreaseSanity(src, 0.5)
-	else
-		sanity = max(minimum, sanity - amount)
-		if(sanity < SANITY_UNSTABLE)
-			if(sanity < SANITY_CRAZY)
-				insanity_effect = (MAJOR_INSANITY_PEN)
-			else
-				insanity_effect = (MINOR_INSANITY_PEN)
-
-/datum/component/mood/proc/IncreaseSanity(datum/source, amount, maximum = SANITY_NEUTRAL)
-	// Disturbed stops you from getting any more sane - I'm just gonna bung this in here
-	var/mob/living/owner = parent
-	if(HAS_TRAIT(owner, TRAIT_UNSTABLE))
-		return
-	if(sanity > maximum)
-		DecreaseSanity(src, 0.5) //Removes some sanity to go back to our current limit.
-	else
-		sanity = min(maximum, sanity + amount)
-		if(sanity > SANITY_CRAZY)
-			if(sanity > SANITY_UNSTABLE)
-				insanity_effect = 0
-			else
-				insanity_effect = MINOR_INSANITY_PEN
+/datum/component/mood/proc/modify_sanity(datum/source, amount, minimum = -INFINITY, maximum = INFINITY)
+	setSanity(sanity + amount, minimum, maximum)
 
 /datum/component/mood/proc/add_event(datum/source, category, type, param) //Category will override any events in the same category, should be unique unless the event is based on the same thing like hunger.
 	var/datum/mood_event/the_event
diff --git a/code/game/atoms_movable.dm b/code/game/atoms_movable.dm
index 83762240bc..146a1cc140 100644
--- a/code/game/atoms_movable.dm
+++ b/code/game/atoms_movable.dm
@@ -422,6 +422,9 @@
 		var/atom/movable/AM = item
 		AM.onTransitZ(old_z,new_z)
 
+/atom/movable/proc/setMovetype(newval)
+	movement_type = newval
+
 //Called whenever an object moves and by mobs when they attempt to move themselves through space
 //And when an object or action applies a force on src, see newtonian_move() below
 //Return 0 to have src start/keep drifting in a no-grav area and 1 to stop/not start drifting
diff --git a/code/game/objects/effects/mines.dm b/code/game/objects/effects/mines.dm
index 32d91ee76a..08f698e018 100644
--- a/code/game/objects/effects/mines.dm
+++ b/code/game/objects/effects/mines.dm
@@ -170,7 +170,7 @@
 	if(!victim.client || !istype(victim))
 		return
 	to_chat(victim, "<span class='notice'>You feel fast!</span>")
-	ADD_TRAIT(victim, TRAIT_GOTTAGOREALLYFAST, "yellow_orb")
+	victim.add_movespeed_modifier(MOVESPEED_ID_YELLOW_ORB, update=TRUE, priority=100, multiplicative_slowdown=-2, blacklisted_movetypes=(FLYING|FLOATING))
 	sleep(duration)
-	REMOVE_TRAIT(victim, TRAIT_GOTTAGOREALLYFAST, "yellow_orb")
+	victim.remove_movespeed_modifier(MOVESPEED_ID_YELLOW_ORB)
 	to_chat(victim, "<span class='notice'>You slow down.</span>")
diff --git a/code/game/objects/items/tanks/jetpack.dm b/code/game/objects/items/tanks/jetpack.dm
index b672eb01ca..d0151fad66 100644
--- a/code/game/objects/items/tanks/jetpack.dm
+++ b/code/game/objects/items/tanks/jetpack.dm
@@ -37,25 +37,33 @@
 		return
 
 	if(!on)
-		turn_on()
+		turn_on(user)
 		to_chat(user, "<span class='notice'>You turn the jetpack on.</span>")
 	else
-		turn_off()
+		turn_off(user)
 		to_chat(user, "<span class='notice'>You turn the jetpack off.</span>")
 	for(var/X in actions)
 		var/datum/action/A = X
 		A.UpdateButtonIcon()
 
-/obj/item/tank/jetpack/proc/turn_on()
+/obj/item/tank/jetpack/proc/turn_on(mob/user)
 	on = TRUE
 	icon_state = "[initial(icon_state)]-on"
 	ion_trail.start()
+	RegisterSignal(user, COMSIG_MOVABLE_MOVED, .proc/move_react)
+	if(full_speed)
+		user.add_movespeed_modifier(MOVESPEED_ID_JETPACK, priority=100, multiplicative_slowdown=-2, movetypes=FLOATING, conflict=MOVE_CONFLICT_JETPACK)
 
-/obj/item/tank/jetpack/proc/turn_off()
+/obj/item/tank/jetpack/proc/turn_off(mob/user)
 	on = FALSE
 	stabilizers = FALSE
 	icon_state = initial(icon_state)
 	ion_trail.stop()
+	UnregisterSignal(user, COMSIG_MOVABLE_MOVED)
+	user.remove_movespeed_modifier(MOVESPEED_ID_JETPACK)
+
+/obj/item/tank/jetpack/proc/move_react(mob/user)
+	allow_thrust(0.01, user)
 
 /obj/item/tank/jetpack/proc/allow_thrust(num, mob/living/user)
 	if(!on)
@@ -178,6 +186,7 @@
 	full_speed = FALSE
 	var/datum/gas_mixture/temp_air_contents
 	var/obj/item/tank/internals/tank = null
+	var/mob/living/carbon/human/cur_user
 
 /obj/item/tank/jetpack/suit/New()
 	..()
@@ -198,28 +207,30 @@
 		return
 	..()
 
-/obj/item/tank/jetpack/suit/turn_on()
-	if(!istype(loc, /obj/item/clothing/suit/space/hardsuit) || !ishuman(loc.loc))
+/obj/item/tank/jetpack/suit/turn_on(mob/user)
+	if(!istype(loc, /obj/item/clothing/suit/space/hardsuit) || !ishuman(loc.loc) || loc.loc != user)
 		return
-	var/mob/living/carbon/human/H = loc.loc
+	var/mob/living/carbon/human/H = user
 	tank = H.s_store
 	air_contents = tank.air_contents
 	START_PROCESSING(SSobj, src)
+	cur_user = user
 	..()
 
-/obj/item/tank/jetpack/suit/turn_off()
+/obj/item/tank/jetpack/suit/turn_off(mob/user)
 	tank = null
 	air_contents = temp_air_contents
 	STOP_PROCESSING(SSobj, src)
+	cur_user = null
 	..()
 
 /obj/item/tank/jetpack/suit/process()
 	if(!istype(loc, /obj/item/clothing/suit/space/hardsuit) || !ishuman(loc.loc))
-		turn_off()
+		turn_off(cur_user)
 		return
 	var/mob/living/carbon/human/H = loc.loc
 	if(!tank || tank != H.s_store)
-		turn_off()
+		turn_off(cur_user)
 		return
 	..()
 
diff --git a/code/modules/antagonists/changeling/powers/strained_muscles.dm b/code/modules/antagonists/changeling/powers/strained_muscles.dm
index 081b1181dc..1f25e06324 100644
--- a/code/modules/antagonists/changeling/powers/strained_muscles.dm
+++ b/code/modules/antagonists/changeling/powers/strained_muscles.dm
@@ -21,7 +21,7 @@
 		to_chat(user, "<span class='notice'>Our muscles tense and strengthen.</span>")
 		changeling.chem_recharge_slowdown += 0.5
 	else
-		REMOVE_TRAIT(user, TRAIT_GOTTAGOFAST, "changeling_muscles")
+		user.remove_movespeed_modifier(MOVESPEED_ID_CHANGELING_MUSCLES)
 		to_chat(user, "<span class='notice'>Our muscles relax.</span>")
 		changeling.chem_recharge_slowdown -= 0.5
 		if(stacks >= 20)
@@ -36,12 +36,12 @@
 /obj/effect/proc_holder/changeling/strained_muscles/proc/muscle_loop(mob/living/carbon/user)
 	var/datum/antagonist/changeling/changeling = user.mind.has_antag_datum(/datum/antagonist/changeling)
 	while(active)
-		ADD_TRAIT(user, TRAIT_GOTTAGOFAST, "changeling_muscles")
+		user.add_movespeed_modifier(MOVESPEED_ID_CHANGELING_MUSCLES, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 		if(user.stat != CONSCIOUS || user.staminaloss >= 90)
 			active = !active
 			to_chat(user, "<span class='notice'>Our muscles relax without the energy to strengthen them.</span>")
 			user.Knockdown(40)
-			REMOVE_TRAIT(user, TRAIT_GOTTAGOFAST, "changeling_muscles")
+			user.remove_movespeed_modifier(MOVESPEED_ID_CHANGELING_MUSCLES)
 			changeling.chem_recharge_slowdown -= 0.5
 			break
 
diff --git a/code/modules/antagonists/revenant/revenant_blight.dm b/code/modules/antagonists/revenant/revenant_blight.dm
index 89d8de283a..dee4557043 100644
--- a/code/modules/antagonists/revenant/revenant_blight.dm
+++ b/code/modules/antagonists/revenant/revenant_blight.dm
@@ -45,11 +45,11 @@
 		if(3)
 			if(!depression)
 				depression = SEND_SIGNAL(affected_mob, COMSIG_ADD_MOOD_EVENT, "rev_blight", /datum/mood_event/revenant_blight)
-			SEND_SIGNAL(affected_mob, COMSIG_DECREASE_SANITY, 0.12, SANITY_CRAZY)
+			SEND_SIGNAL(affected_mob, COMSIG_MODIFY_SANITY, -0.12, SANITY_CRAZY)
 			if(prob(10))
 				affected_mob.emote(pick("pale","shiver"))
 		if(4)
-			SEND_SIGNAL(affected_mob, COMSIG_DECREASE_SANITY, 0.18, SANITY_CRAZY)
+			SEND_SIGNAL(affected_mob, COMSIG_MODIFY_SANITY, -0.18, SANITY_CRAZY)
 			if(prob(15))
 				affected_mob.emote(pick("pale","shiver","cries"))
 		if(5)
diff --git a/code/modules/antagonists/slaughter/slaughter.dm b/code/modules/antagonists/slaughter/slaughter.dm
index 03a176b054..f45555a6ee 100644
--- a/code/modules/antagonists/slaughter/slaughter.dm
+++ b/code/modules/antagonists/slaughter/slaughter.dm
@@ -34,7 +34,6 @@
 	melee_damage_upper = 30
 	see_in_dark = 8
 	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_INVISIBLE
-	var/boost = 0
 	bloodcrawl = BLOODCRAWL_EAT
 	var/playstyle_string = "<span class='big bold'>You are a slaughter demon,</span><B> a terrible creature from another realm. You have a single desire: To kill.  \
 							You may use the \"Blood Crawl\" ability near blood pools to travel through them, appearing and disappearing from the station at will. \
@@ -54,24 +53,18 @@
 	if(istype(loc, /obj/effect/dummy/phased_mob/slaughter))
 		bloodspell.phased = TRUE
 
-/mob/living/simple_animal/slaughter/Life()
-	..()
-	if(boost<world.time)
-		speed = 1
-	else
-		speed = 0
-
 /obj/effect/decal/cleanable/blood/innards
 	icon = 'icons/obj/surgery.dmi'
 	name = "pile of viscera"
 	desc = "A repulsive pile of guts and gore."
 	gender = NEUTER
 	icon_state = "innards"
+	random_icon_states = null
 
 /mob/living/simple_animal/slaughter/phasein()
 	. = ..()
-	speed = 0
-	boost = world.time + 60
+	add_movespeed_modifier(MOVESPEED_ID_SLAUGHTER, update=TRUE, priority=100, multiplicative_slowdown=-1)
+	addtimer(CALLBACK(src, .proc/remove_movespeed_modifier, MOVESPEED_ID_SLAUGHTER, TRUE), 6 SECONDS, TIMER_UNIQUE | TIMER_OVERRIDE)
 
 
 //The loot from killing a slaughter demon - can be consumed to allow the user to blood crawl
diff --git a/code/modules/mob/living/bloodcrawl.dm b/code/modules/mob/living/bloodcrawl.dm
index cc11c0e8bb..1e75fc4ef8 100644
--- a/code/modules/mob/living/bloodcrawl.dm
+++ b/code/modules/mob/living/bloodcrawl.dm
@@ -152,8 +152,7 @@
 		newcolor = rgb(43, 186, 0)
 	add_atom_colour(newcolor, TEMPORARY_COLOUR_PRIORITY)
 	// but only for a few seconds
-	spawn(30)
-		remove_atom_colour(TEMPORARY_COLOUR_PRIORITY, newcolor)
+	addtimer(CALLBACK(src, /atom/.proc/remove_atom_colour, TEMPORARY_COLOUR_PRIORITY, newcolor), 6 SECONDS)
 
 /mob/living/proc/phasein(obj/effect/decal/cleanable/B)
 	if(src.notransform)
diff --git a/code/modules/mob/living/carbon/human/physiology.dm b/code/modules/mob/living/carbon/human/physiology.dm
index ac9e9fe219..4d411deb53 100644
--- a/code/modules/mob/living/carbon/human/physiology.dm
+++ b/code/modules/mob/living/carbon/human/physiology.dm
@@ -21,8 +21,6 @@
 	var/bleed_mod = 1     	// % bleeding modifier
 	var/datum/armor/armor 	// internal armor datum
 
-	var/speed_mod = 0     	//tick modifier for each step. Positive is slower, negative is faster.
-
 	var/hunger_mod = 1		//% of hunger rate taken per tick.
 
 	var/do_after_speed = 1 //Speed mod for do_after. Lower is better. If temporarily adjusting, please only modify using *= and /=, so you don't interrupt other calculations.
diff --git a/code/modules/mob/living/carbon/human/species.dm b/code/modules/mob/living/carbon/human/species.dm
index a59d9e914b..a9312f47fe 100644
--- a/code/modules/mob/living/carbon/human/species.dm
+++ b/code/modules/mob/living/carbon/human/species.dm
@@ -332,6 +332,8 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 		if("meat_type" in default_features) //I can't believe it's come to the meat
 			H.type_of_meat = GLOB.meat_types[H.dna.features["meat_type"]]
 
+	C.add_movespeed_modifier(MOVESPEED_ID_SPECIES, TRUE, 100, override=TRUE, multiplicative_slowdown=speedmod, movetypes=(~FLYING))
+
 	SEND_SIGNAL(C, COMSIG_SPECIES_GAIN, src, old_species)
 
 
@@ -345,6 +347,8 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 	for(var/X in inherent_traits)
 		REMOVE_TRAIT(C, X, SPECIES_TRAIT)
 
+	C.remove_movespeed_modifier(MOVESPEED_ID_SPECIES)
+
 	if("meat_type" in default_features)
 		C.type_of_meat = GLOB.meat_types[C.dna.features["meat_type"]]
 	else
@@ -1376,39 +1380,16 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 /datum/species/proc/movement_delay(mob/living/carbon/human/H)
 	. = 0	//We start at 0.
 	var/flight = 0	//Check for flight and flying items
-	var/ignoreslow = 0
 	var/gravity = 0
 	if(H.movement_type & FLYING)
 		flight = 1
 
 	gravity = H.has_gravity()
 
-	if(gravity && !flight)	//Check for chemicals and innate speedups and slowdowns if we're on the ground
-		if(HAS_TRAIT(H, TRAIT_GOTTAGOFAST))
-			. -= 1
-		if(HAS_TRAIT(H, TRAIT_GOTTAGOREALLYFAST))
-			. -= 2
-		. += speedmod
-		. += H.physiology.speed_mod
-
 	if (H.m_intent == MOVE_INTENT_WALK && HAS_TRAIT(H, TRAIT_SPEEDY_STEP))
 		. -= 1.5
 
-	if(HAS_TRAIT(H, TRAIT_IGNORESLOWDOWN))
-		ignoreslow = 1
-
-	if(!gravity)
-		var/obj/item/tank/jetpack/J = H.back
-		var/obj/item/clothing/suit/space/hardsuit/C = H.wear_suit
-		var/obj/item/organ/cyberimp/chest/thrusters/T = H.getorganslot(ORGAN_SLOT_THRUSTERS)
-		if(!istype(J) && istype(C))
-			J = C.jetpack
-		if(istype(J) && J.full_speed && J.allow_thrust(0.01, H))	//Prevents stacking
-			. -= 0.4
-		else if(istype(T) && T.allow_thrust(0.01, H))
-			. -= 0.4
-
-	if(!ignoreslow && gravity)
+	if(!H.has_trait(TRAIT_IGNORESLOWDOWN) && gravity)
 		if(H.wear_suit)
 			. += H.wear_suit.slowdown
 		if(H.shoes)
@@ -1435,16 +1416,6 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 			var/grav_force = min(gravity - STANDARD_GRAVITY,3)
 			. += 1 + grav_force
 
-		GET_COMPONENT_FROM(mood, /datum/component/mood, H)
-		if(mood && !flight) //How can depression slow you down if you can just fly away from your problems?
-			switch(mood.sanity)
-				if(SANITY_INSANE to SANITY_CRAZY)
-					. += 1.5
-				if(SANITY_CRAZY to SANITY_UNSTABLE)
-					. += 1
-				if(SANITY_UNSTABLE to SANITY_DISTURBED)
-					. += 0.5
-
 		if(HAS_TRAIT(H, TRAIT_FAT))
 			. += (1.5 - flight)
 		if(H.bodytemperature < BODYTEMP_COLD_DAMAGE_LIMIT && !HAS_TRAIT(H, TRAIT_RESISTCOLD))
@@ -1927,8 +1898,8 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 			var/knocked_item = FALSE
 			if(!is_type_in_typecache(target_held_item, GLOB.shove_disarming_types))
 				target_held_item = null
-			if(!target.has_movespeed_modifier(SHOVE_SLOWDOWN_ID))
-				target.add_movespeed_modifier(SHOVE_SLOWDOWN_ID, multiplicative_slowdown = SHOVE_SLOWDOWN_STRENGTH)
+			if(!target.has_movespeed_modifier(MOVESPEED_ID_SHOVE))
+				target.add_movespeed_modifier(MOVESPEED_ID_SHOVE, multiplicative_slowdown = SHOVE_SLOWDOWN_STRENGTH)
 				if(target_held_item)
 					target.visible_message("<span class='danger'>[target.name]'s grip on \the [target_held_item] loosens!</span>",
 						"<span class='danger'>Your grip on \the [target_held_item] loosens!</span>", null, COMBAT_MESSAGE_RANGE)
diff --git a/code/modules/mob/living/carbon/human/species_types/angel.dm b/code/modules/mob/living/carbon/human/species_types/angel.dm
index c1c848106c..7669a8c740 100644
--- a/code/modules/mob/living/carbon/human/species_types/angel.dm
+++ b/code/modules/mob/living/carbon/human/species_types/angel.dm
@@ -29,7 +29,7 @@
 	if(fly)
 		fly.Remove(H)
 	if(H.movement_type & FLYING)
-		H.movement_type &= ~FLYING
+		H.setMovetype(H.movement_type & ~FLYING)
 	ToggleFlight(H,0)
 	if(H.dna && H.dna.species && (H.dna.features["wings"] == "Angel"))
 		if("wings" in H.dna.species.mutant_bodyparts)
@@ -132,14 +132,14 @@
 	if(flight && CanFly(H))
 		stunmod = 2
 		speedmod = -0.35
-		H.movement_type |= FLYING
+		H.setMovetype(H.movement_type | FLYING)
 		override_float = TRUE
 		H.pass_flags |= PASSTABLE
 		H.OpenWings()
 	else
 		stunmod = 1
 		speedmod = 0
-		H.movement_type &= ~FLYING
+		H.setMovetype(H.movement_type & ~FLYING)
 		override_float = FALSE
 		H.pass_flags &= ~PASSTABLE
 		H.CloseWings()
\ No newline at end of file
diff --git a/code/modules/mob/living/simple_animal/hostile/giant_spider.dm b/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
index f5b1706f87..2f39ae13a1 100644
--- a/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
+++ b/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
@@ -175,14 +175,17 @@
 	status_flags = NONE
 	mob_size = MOB_SIZE_LARGE
 	gold_core_spawnable = NO_SPAWN
+	var/slowed_by_webs = FALSE
 
-/mob/living/simple_animal/hostile/poison/giant_spider/tarantula/movement_delay()
-	var/turf/T = get_turf(src)
-	if(locate(/obj/structure/spider/stickyweb) in T)
-		speed = 2
-	else
-		speed = 7
+/mob/living/simple_animal/hostile/poison/giant_spider/tarantula/Moved(atom/oldloc, dir)
 	. = ..()
+	if(slowed_by_webs)
+		if(!(locate(/obj/structure/spider/stickyweb) in loc))
+			remove_movespeed_modifier(MOVESPEED_ID_TARANTULA_WEB)
+			slowed_by_webs = FALSE
+	else if(locate(/obj/structure/spider/stickyweb) in loc)
+		add_movespeed_modifier(MOVESPEED_ID_TARANTULA_WEB, priority=100, multiplicative_slowdown=3)
+		slowed_by_webs = TRUE
 
 //midwives are the queen of the spiders, can send messages to all them and web faster. That rare round where you get a queen spider and turn your 'for honor' players into 'r6siege' players will be a fun one.
 /mob/living/simple_animal/hostile/poison/giant_spider/nurse/midwife
diff --git a/code/modules/mob/living/simple_animal/simple_animal.dm b/code/modules/mob/living/simple_animal/simple_animal.dm
index 1f81899d8a..c017543445 100644
--- a/code/modules/mob/living/simple_animal/simple_animal.dm
+++ b/code/modules/mob/living/simple_animal/simple_animal.dm
@@ -363,7 +363,7 @@
 		density = initial(density)
 		lying = 0
 		. = 1
-		movement_type = initial(movement_type)
+		setMovetype(initial(movement_type))
 
 /mob/living/simple_animal/proc/make_babies() // <3 <3 <3
 	if(gender != FEMALE || stat || next_scan_time > world.time || !childtype || !animal_species || !SSticker.IsRoundInProgress())
diff --git a/code/modules/mob/living/ventcrawling.dm b/code/modules/mob/living/ventcrawling.dm
index 930656228d..cacd1c7c56 100644
--- a/code/modules/mob/living/ventcrawling.dm
+++ b/code/modules/mob/living/ventcrawling.dm
@@ -100,7 +100,7 @@ GLOBAL_LIST_INIT(ventcrawl_machinery, typecacheof(list(
 					A.pipe_vision_img.plane = ABOVE_HUD_PLANE
 				client.images += A.pipe_vision_img
 				pipes_shown += A.pipe_vision_img
-		movement_type |= VENTCRAWLING
+		setMovetype(movement_type | VENTCRAWLING)
 
 
 /mob/living/proc/remove_ventcrawl()
@@ -108,7 +108,7 @@ GLOBAL_LIST_INIT(ventcrawl_machinery, typecacheof(list(
 		for(var/image/current_image in pipes_shown)
 			client.images -= current_image
 	pipes_shown.len = 0
-	movement_type &= ~VENTCRAWLING
+	setMovetype(movement_type & ~VENTCRAWLING)
 
 
 
diff --git a/code/modules/mob/mob.dm b/code/modules/mob/mob.dm
index 5a7c6e21ab..f02a5abf36 100644
--- a/code/modules/mob/mob.dm
+++ b/code/modules/mob/mob.dm
@@ -959,3 +959,7 @@ GLOBAL_VAR_INIT(exploit_warn_spam_prevention, 0)
 
 	var/datum/language_holder/H = get_language_holder()
 	H.open_language_menu(usr)
+
+/mob/setMovetype(newval)
+	. = ..()
+	update_movespeed(FALSE)
\ No newline at end of file
diff --git a/code/modules/mob/mob_movespeed.dm b/code/modules/mob/mob_movespeed.dm
index 5114972493..9b24f72c80 100644
--- a/code/modules/mob/mob_movespeed.dm
+++ b/code/modules/mob/mob_movespeed.dm
@@ -1,23 +1,29 @@
 
 /*Current movespeed modification list format: list(id = list(
 	priority,
+	flags,
 	legacy slowdown/speedup amount,
+	movetype_flags,
+	blacklisted_movetypes,
+	conflict
 	))
 */
 
 //ANY ADD/REMOVE DONE IN UPDATE_MOVESPEED MUST HAVE THE UPDATE ARGUMENT SET AS FALSE!
-/mob/proc/add_movespeed_modifier(id, update = TRUE, priority = 0, flags = NONE, override = FALSE, multiplicative_slowdown = 0)
-	var/list/temp = list(priority, flags, multiplicative_slowdown)			//build the modification list
+/mob/proc/add_movespeed_modifier(id, update=TRUE, priority=0, flags=NONE, override=FALSE, multiplicative_slowdown=0, movetypes=ALL, blacklisted_movetypes=NONE, conflict=FALSE)
+	var/list/temp = list(priority, flags, multiplicative_slowdown, movetypes, blacklisted_movetypes, conflict)			//build the modification list
+	var/resort = TRUE
 	if(LAZYACCESS(movespeed_modification, id))
-		if(movespeed_modifier_identical_check(movespeed_modification[id], temp))
+		var/list/existing_data = movespeed_modification[id]
+		if(movespeed_modifier_identical_check(existing_data, temp))
 			return FALSE
 		if(!override)
 			return FALSE
-		else
-			remove_movespeed_modifier(id, update)
-	LAZYSET(movespeed_modification, id, list(priority, flags, multiplicative_slowdown))
+		if(priority == existing_data[MOVESPEED_DATA_INDEX_PRIORITY])
+			resort = FALSE // We don't need to re-sort if we're replacing something already there and it's the same priority
+	LAZYSET(movespeed_modification, id, temp)
 	if(update)
-		update_movespeed(TRUE)
+		update_movespeed(resort)
 	return TRUE
 
 /mob/proc/remove_movespeed_modifier(id, update = TRUE)
@@ -55,9 +61,22 @@
 	if(resort)
 		sort_movespeed_modlist()
 	. = 0
+	var/list/conflict_tracker = list()
 	for(var/id in get_movespeed_modifiers())
 		var/list/data = movespeed_modification[id]
-		. += data[MOVESPEED_DATA_INDEX_MULTIPLICATIVE_SLOWDOWN]
+		if(!(data[MOVESPEED_DATA_INDEX_MOVETYPE] & movement_type)) // We don't affect any of these move types, skip
+			continue
+		if(data[MOVESPEED_DATA_INDEX_BL_MOVETYPE] & movement_type) // There's a movetype here that disables this modifier, skip
+		var/conflict = data[MOVESPEED_DATA_INDEX_CONFLICT]
+		var/amt = data[MOVESPEED_DATA_INDEX_MULTIPLICATIVE_SLOWDOWN]
+		if(conflict)
+			// Conflicting modifiers prioritize the larger slowdown or the larger speedup
+			// We purposefuly don't handle mixing speedups and slowdowns on the same id
+			if(abs(conflict_tracker[conflict]) < abs(amt))
+				conflict_tracker[conflict] = amt
+			else
+				continue
+		. += amt
 	cached_multiplicative_slowdown = .
 
 /mob/proc/get_movespeed_modifiers()
diff --git a/code/modules/reagents/chemistry/reagents/drink_reagents.dm b/code/modules/reagents/chemistry/reagents/drink_reagents.dm
index dd51ce2bc7..1afbed3533 100644
--- a/code/modules/reagents/chemistry/reagents/drink_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/drink_reagents.dm
@@ -407,10 +407,10 @@
 
 /datum/reagent/consumable/nuka_cola/on_mob_metabolize(mob/living/L)
 	..()
-	ADD_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.add_movespeed_modifier(id, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 
 /datum/reagent/consumable/nuka_cola/on_mob_end_metabolize(mob/living/L)
-	REMOVE_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.remove_movespeed_modifier(id)
 	..()
 
 /datum/reagent/consumable/nuka_cola/on_mob_life(mob/living/carbon/M)
diff --git a/code/modules/reagents/chemistry/reagents/drug_reagents.dm b/code/modules/reagents/chemistry/reagents/drug_reagents.dm
index f3df72cd4d..10d0405950 100644
--- a/code/modules/reagents/chemistry/reagents/drug_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/drug_reagents.dm
@@ -469,7 +469,7 @@
 
 /datum/reagent/drug/skooma/on_mob_metabolize(mob/living/L)
 	. = ..()
-	ADD_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.add_movespeed_modifier(id, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 	L.next_move_modifier *= 2
 	if(ishuman(L))
 		var/mob/living/carbon/human/H = L
@@ -480,7 +480,7 @@
 
 /datum/reagent/drug/skooma/on_mob_end_metabolize(mob/living/L)
 	. = ..()
-	REMOVE_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.remove_movespeed_modifier(id)
 	L.next_move_modifier *= 0.5
 	if(ishuman(L))
 		var/mob/living/carbon/human/H = L
diff --git a/code/modules/reagents/chemistry/reagents/medicine_reagents.dm b/code/modules/reagents/chemistry/reagents/medicine_reagents.dm
index 775308589f..4bdb22e227 100644
--- a/code/modules/reagents/chemistry/reagents/medicine_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/medicine_reagents.dm
@@ -984,10 +984,10 @@ datum/reagent/medicine/styptic_powder/overdose_start(mob/living/M)
 
 /datum/reagent/medicine/stimulants/on_mob_metabolize(mob/living/L)
 	..()
-	ADD_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.add_movespeed_modifier(id, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 
 /datum/reagent/medicine/stimulants/on_mob_end_metabolize(mob/living/L)
-	REMOVE_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.remove_movespeed_modifier(id)
 	..()
 
 /datum/reagent/medicine/stimulants/on_mob_life(mob/living/carbon/M)
@@ -1308,10 +1308,10 @@ datum/reagent/medicine/styptic_powder/overdose_start(mob/living/M)
 
 /datum/reagent/medicine/changelinghaste/on_mob_metabolize(mob/living/L)
 	..()
-	ADD_TRAIT(L, TRAIT_GOTTAGOREALLYFAST, id)
+	L.add_movespeed_modifier(id, update=TRUE, priority=100, multiplicative_slowdown=-2, blacklisted_movetypes=(FLYING|FLOATING))
 
 /datum/reagent/medicine/changelinghaste/on_mob_end_metabolize(mob/living/L)
-	REMOVE_TRAIT(L, TRAIT_GOTTAGOREALLYFAST, id)
+	L.remove_movespeed_modifier(id)
 	..()
 
 /datum/reagent/medicine/changelinghaste/on_mob_life(mob/living/carbon/M)
diff --git a/code/modules/reagents/chemistry/reagents/other_reagents.dm b/code/modules/reagents/chemistry/reagents/other_reagents.dm
index 95b4a33c0d..40a518fd6c 100644
--- a/code/modules/reagents/chemistry/reagents/other_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/other_reagents.dm
@@ -1353,10 +1353,10 @@
 
 /datum/reagent/nitryl/on_mob_metabolize(mob/living/L)
 	..()
-	ADD_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.add_movespeed_modifier(id, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 
 /datum/reagent/nitryl/on_mob_end_metabolize(mob/living/L)
-	REMOVE_TRAIT(L, TRAIT_GOTTAGOFAST, id)
+	L.remove_movespeed_modifier(id)
 	..()
 
 /////////////////////////Coloured Crayon Powder////////////////////////////
diff --git a/code/modules/research/xenobiology/crossbreeding/_status_effects.dm b/code/modules/research/xenobiology/crossbreeding/_status_effects.dm
index b9e7122d07..126603ce2a 100644
--- a/code/modules/research/xenobiology/crossbreeding/_status_effects.dm
+++ b/code/modules/research/xenobiology/crossbreeding/_status_effects.dm
@@ -375,15 +375,11 @@ datum/status_effect/rebreathing/tick()
 	duration = 30
 
 /datum/status_effect/tarfoot/on_apply()
-	var/mob/living/carbon/human/H = owner
-	if(istype(H))
-		H.physiology.speed_mod += 0.5
+	owner.add_movespeed_modifier(MOVESPEED_ID_TARFOOT, update=TRUE, priority=100, multiplicative_slowdown=0.5, blacklisted_movetypes=(FLYING|FLOATING))
 	return ..()
 
 /datum/status_effect/tarfoot/on_remove()
-	var/mob/living/carbon/human/H = owner
-	if(istype(H))
-		H.physiology.speed_mod -= 0.5
+	owner.remove_movespeed_modifier(MOVESPEED_ID_TARFOOT)
 
 /datum/status_effect/spookcookie
 	id = "spookcookie"
@@ -695,20 +691,15 @@ datum/status_effect/stabilized/blue/on_remove()
 /datum/status_effect/stabilized/sepia/tick()
 	if(prob(50) && mod > -1)
 		mod--
-		var/mob/living/carbon/human/H = owner
-		if(istype(H))
-			H.physiology.speed_mod--
+		owner.add_movespeed_modifier(MOVESPEED_ID_SEPIA, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 	else if(mod < 1)
 		mod++
-		var/mob/living/carbon/human/H = owner
-		if(istype(H))
-			H.physiology.speed_mod++
+		// yeah a value of 0 does nothing but replacing the trait in place is cheaper than removing and adding repeatedly
+		owner.add_movespeed_modifier(MOVESPEED_ID_SEPIA, update=TRUE, priority=100, multiplicative_slowdown=0, blacklisted_movetypes=(FLYING|FLOATING))
 	return ..()
 
 /datum/status_effect/stabilized/sepia/on_remove()
-	var/mob/living/carbon/human/H = owner
-	if(istype(H))
-		H.physiology.speed_mod += -mod //Reset the changes.
+	owner.remove_movespeed_modifier(MOVESPEED_ID_SEPIA).
 
 /datum/status_effect/stabilized/cerulean
 	id = "stabilizedcerulean"
@@ -916,7 +907,7 @@ datum/status_effect/stabilized/blue/on_remove()
 	colour = "light pink"
 
 /datum/status_effect/stabilized/lightpink/on_apply()
-	ADD_TRAIT(owner, TRAIT_GOTTAGOFAST,"slimestatus")
+	owner.add_movespeed_modifier(MOVESPEED_ID_SLIME_STATUS, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 	return ..()
 
 /datum/status_effect/stabilized/lightpink/tick()
@@ -927,7 +918,7 @@ datum/status_effect/stabilized/blue/on_remove()
 	return ..()
 
 /datum/status_effect/stabilized/lightpink/on_remove()
-	REMOVE_TRAIT(owner, TRAIT_GOTTAGOFAST,"slimestatus")
+	owner.remove_movespeed_modifier(MOVESPEED_ID_SLIME_STATUS)
 
 /datum/status_effect/stabilized/adamantine
 	id = "stabilizedadamantine"
diff --git a/code/modules/station_goals/dna_vault.dm b/code/modules/station_goals/dna_vault.dm
index 3073a6fcc3..2aae17b0f3 100644
--- a/code/modules/station_goals/dna_vault.dm
+++ b/code/modules/station_goals/dna_vault.dm
@@ -276,7 +276,7 @@
 			ADD_TRAIT(H, TRAIT_PIERCEIMMUNE, "dna_vault")
 		if(VAULT_SPEED)
 			to_chat(H, "<span class='notice'>Your legs feel faster.</span>")
-			ADD_TRAIT(H, TRAIT_GOTTAGOFAST, "dna_vault")
+			H.add_movespeed_modifier(MOVESPEED_ID_DNA_VAULT, update=TRUE, priority=100, multiplicative_slowdown=-1, blacklisted_movetypes=(FLYING|FLOATING))
 		if(VAULT_QUICK)
 			to_chat(H, "<span class='notice'>Your arms move as fast as lightning.</span>")
 			H.next_move_modifier = 0.5
diff --git a/code/modules/surgery/organs/augments_chest.dm b/code/modules/surgery/organs/augments_chest.dm
index 7156b8180b..8af52abc47 100644
--- a/code/modules/surgery/organs/augments_chest.dm
+++ b/code/modules/surgery/organs/augments_chest.dm
@@ -129,7 +129,7 @@
 	var/datum/effect_system/trail_follow/ion/ion_trail
 
 /obj/item/organ/cyberimp/chest/thrusters/Insert(mob/living/carbon/M, special = 0)
-	..()
+	. = ..()
 	if(!ion_trail)
 		ion_trail = new
 	ion_trail.set_up(M)
@@ -151,10 +151,14 @@
 		on = TRUE
 		if(allow_thrust(0.01))
 			ion_trail.start()
+			RegisterSignal(owner, COMSIG_MOVABLE_MOVED, .proc/move_react)
+			owner.add_movespeed_modifier(MOVESPEED_ID_CYBER_THRUSTER, priority=100, multiplicative_slowdown=-2, movetypes=FLOATING, conflict=MOVE_CONFLICT_JETPACK)
 			if(!silent)
 				to_chat(owner, "<span class='notice'>You turn your thrusters set on.</span>")
 	else
 		ion_trail.stop()
+		UnregisterSignal(owner, COMSIG_MOVABLE_MOVED)
+		owner.remove_movespeed_modifier(MOVESPEED_ID_CYBER_THRUSTER)
 		if(!silent)
 			to_chat(owner, "<span class='notice'>You turn your thrusters set off.</span>")
 		on = FALSE
@@ -169,6 +173,9 @@
 		var/datum/action/A = X
 		A.UpdateButtonIcon()
 
+/obj/item/organ/cyberimp/chest/thrusters/proc/move_react()
+	allow_thrust(0.01)
+
 /obj/item/organ/cyberimp/chest/thrusters/proc/allow_thrust(num)
 	if(!on || !owner)
 		return 0