diff --git a/code/game/atoms_movable.dm b/code/game/atoms_movable.dm
index 353b5726ce..9d3b208acc 100644
--- a/code/game/atoms_movable.dm
+++ b/code/game/atoms_movable.dm
@@ -62,7 +62,7 @@
 
 /atom/movable/Move(atom/newloc, direct = 0)
 	if(!loc || !newloc)
-		return 0
+		return FALSE
 	var/atom/oldloc = loc
 
 	if(loc != newloc)
@@ -113,7 +113,7 @@
 	last_move = direct
 	setDir(direct)
 	if(. && has_buckled_mobs() && !handle_buckled_mob_movement(loc,direct)) //movement failed due to buckled mob(s)
-		. = 0
+		return FALSE
 
 //Called after a successful Move(). By this point, we've already moved
 /atom/movable/proc/Moved(atom/OldLoc, Dir, Forced = FALSE)
@@ -325,9 +325,6 @@
 	SSspacedrift.processing[src] = src
 	return 1
 
-/atom/movable/proc/checkpass(passflag)
-	return pass_flags&passflag
-
 /atom/movable/proc/throw_impact(atom/hit_atom, throwingdatum)
 	set waitfor = 0
 	SendSignal(COMSIG_MOVABLE_IMPACT, hit_atom, throwingdatum)
diff --git a/code/game/gamemodes/blob/overmind.dm b/code/game/gamemodes/blob/overmind.dm
index 2544e1f88a..44775ae976 100644
--- a/code/game/gamemodes/blob/overmind.dm
+++ b/code/game/gamemodes/blob/overmind.dm
@@ -84,14 +84,14 @@ GLOBAL_LIST_EMPTY(blob_nodes)
 		if(!T || !(T.z in GLOB.station_z_levels))
 			continue
 
-		if(L in GLOB.overminds || L.checkpass(PASSBLOB))
+		if(L in GLOB.overminds || (L.pass_flags & PASSBLOB))
 			continue
 
 		var/area/Ablob = get_area(T)
 
 		if(!Ablob.blob_allowed)
 			continue
-		
+
 		if(!("blob" in L.faction))
 			playsound(L, 'sound/effects/splat.ogg', 50, 1)
 			L.death()
diff --git a/code/game/gamemodes/blob/theblob.dm b/code/game/gamemodes/blob/theblob.dm
index 8570cf294c..0c642692f0 100644
--- a/code/game/gamemodes/blob/theblob.dm
+++ b/code/game/gamemodes/blob/theblob.dm
@@ -67,7 +67,7 @@
 	return atmosblock
 
 /obj/structure/blob/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSBLOB))
+	if(istype(mover) && (mover.pass_flags & PASSBLOB))
 		return 1
 	return 0
 
@@ -78,7 +78,7 @@
 	. = 0
 	if(ismovableatom(caller))
 		var/atom/movable/mover = caller
-		. = . || mover.checkpass(PASSBLOB)
+		. = . || (mover.pass_flags & PASSBLOB)
 
 /obj/structure/blob/update_icon() //Updates color based on overmind color if we have an overmind.
 	if(overmind)
diff --git a/code/game/machinery/computer/crew.dm b/code/game/machinery/computer/crew.dm
index 2b46f1959c..ea808171cc 100644
--- a/code/game/machinery/computer/crew.dm
+++ b/code/game/machinery/computer/crew.dm
@@ -258,16 +258,12 @@ GLOBAL_DATUM_INIT(crewmonitor, /datum/crewmonitor, new)
 		AI.switchCamera(C)
 
 /mob/living/carbon/human/Move()
+	var/old_z = src.z
+	. = ..()
 	if (src.w_uniform)
-		var/old_z = src.z
-
-		. = ..()
-
 		if (old_z != src.z)
 			GLOB.crewmonitor.queueUpdate(old_z)
 		GLOB.crewmonitor.queueUpdate(src.z)
-	else
-		return ..()
 
 /datum/crewmonitor/proc/queueUpdate(z)
 	addtimer(CALLBACK(src, .proc/update, z), 5, TIMER_UNIQUE)
diff --git a/code/game/machinery/doors/door.dm b/code/game/machinery/doors/door.dm
index 883cc3986f..fa6275809d 100644
--- a/code/game/machinery/doors/door.dm
+++ b/code/game/machinery/doors/door.dm
@@ -103,7 +103,7 @@
 	move_update_air(T)
 
 /obj/machinery/door/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return !opacity
 	return !density
 
diff --git a/code/game/machinery/doors/firedoor.dm b/code/game/machinery/doors/firedoor.dm
index 63da575fc1..ad746d089f 100644
--- a/code/game/machinery/doors/firedoor.dm
+++ b/code/game/machinery/doors/firedoor.dm
@@ -212,7 +212,7 @@
 	CanAtmosPass = ATMOS_PASS_PROC
 
 /obj/machinery/door/firedoor/border_only/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	if(get_dir(loc, target) == dir) //Make sure looking at appropriate border
 		return !density
@@ -220,7 +220,7 @@
 		return 1
 
 /obj/machinery/door/firedoor/border_only/CheckExit(atom/movable/mover as mob|obj, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	if(get_dir(loc, target) == dir)
 		return !density
diff --git a/code/game/machinery/doors/windowdoor.dm b/code/game/machinery/doors/windowdoor.dm
index 4809f3ff49..2313afec3b 100644
--- a/code/game/machinery/doors/windowdoor.dm
+++ b/code/game/machinery/doors/windowdoor.dm
@@ -90,7 +90,7 @@
 	return
 
 /obj/machinery/door/window/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	if(get_dir(loc, target) == dir) //Make sure looking at appropriate border
 		return !density
@@ -118,7 +118,7 @@
 	return !density || (dir != to_dir) || (check_access(ID) && hasPower())
 
 /obj/machinery/door/window/CheckExit(atom/movable/mover as mob|obj, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	if(get_dir(loc, target) == dir)
 		return !density
diff --git a/code/game/machinery/shieldgen.dm b/code/game/machinery/shieldgen.dm
index d9362033a6..9356314973 100644
--- a/code/game/machinery/shieldgen.dm
+++ b/code/game/machinery/shieldgen.dm
@@ -434,7 +434,7 @@
 			gen_secondary.use_stored_power(drain_amount*0.5)
 
 /obj/machinery/shieldwall/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return prob(20)
 	else
 		if(istype(mover, /obj/item/projectile))
diff --git a/code/game/objects/effects/effect_system/effects_foam.dm b/code/game/objects/effects/effect_system/effects_foam.dm
index cdba69b140..3459bfc954 100644
--- a/code/game/objects/effects/effect_system/effects_foam.dm
+++ b/code/game/objects/effects/effect_system/effects_foam.dm
@@ -295,7 +295,7 @@
 			Item.extinguish()
 
 /obj/structure/foamedmetal/resin/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return TRUE
 	. = ..()
 
diff --git a/code/game/objects/items/devices/forcefieldprojector.dm b/code/game/objects/items/devices/forcefieldprojector.dm
index e3fb16ee81..42bd8908d1 100644
--- a/code/game/objects/items/devices/forcefieldprojector.dm
+++ b/code/game/objects/items/devices/forcefieldprojector.dm
@@ -95,7 +95,7 @@
 	return ..()
 
 /obj/structure/projected_forcefield/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	return !density
 
diff --git a/code/game/objects/structures/girders.dm b/code/game/objects/structures/girders.dm
index d0a00b060e..3061a9d258 100644
--- a/code/game/objects/structures/girders.dm
+++ b/code/game/objects/structures/girders.dm
@@ -287,7 +287,7 @@
 			return TRUE
 
 /obj/structure/girder/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGRILLE))
+	if(istype(mover) && (mover.pass_flags & PASSGRILLE))
 		return prob(girderpasschance)
 	else
 		if(istype(mover, /obj/item/projectile))
@@ -299,7 +299,7 @@
 	. = !density
 	if(ismovableatom(caller))
 		var/atom/movable/mover = caller
-		. = . || mover.checkpass(PASSGRILLE)
+		. = . || (mover.pass_flags & PASSGRILLE)
 
 /obj/structure/girder/deconstruct(disassembled = TRUE)
 	if(!(flags_1 & NODECONSTRUCT_1))
diff --git a/code/game/objects/structures/grille.dm b/code/game/objects/structures/grille.dm
index 308a759929..138851dd35 100644
--- a/code/game/objects/structures/grille.dm
+++ b/code/game/objects/structures/grille.dm
@@ -100,7 +100,7 @@
 
 
 /obj/structure/grille/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGRILLE))
+	if(istype(mover) && (mover.pass_flags & PASSGRILLE))
 		return TRUE
 	else
 		if(istype(mover, /obj/item/projectile) && density)
@@ -112,7 +112,7 @@
 	. = !density
 	if(ismovableatom(caller))
 		var/atom/movable/mover = caller
-		. = . || mover.checkpass(PASSGRILLE)
+		. = . || (mover.pass_flags & PASSGRILLE)
 
 /obj/structure/grille/attackby(obj/item/W, mob/user, params)
 	user.changeNext_move(CLICK_CD_MELEE)
diff --git a/code/game/objects/structures/morgue.dm b/code/game/objects/structures/morgue.dm
index a5def04e0b..8b3d2981e2 100644
--- a/code/game/objects/structures/morgue.dm
+++ b/code/game/objects/structures/morgue.dm
@@ -323,7 +323,7 @@ GLOBAL_LIST_EMPTY(crematoriums)
 	icon_state = "morguet"
 
 /obj/structure/tray/m_tray/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSTABLE))
+	if(istype(mover) && (mover.pass_flags & PASSTABLE))
 		return 1
 	if(locate(/obj/structure/table) in get_turf(mover))
 		return 1
@@ -334,4 +334,4 @@ GLOBAL_LIST_EMPTY(crematoriums)
 	. = !density
 	if(ismovableatom(caller))
 		var/atom/movable/mover = caller
-		. = . || mover.checkpass(PASSTABLE)
+		. = . || (mover.pass_flags & PASSTABLE)
diff --git a/code/game/objects/structures/plasticflaps.dm b/code/game/objects/structures/plasticflaps.dm
index 16e77c1141..d0d8989e04 100644
--- a/code/game/objects/structures/plasticflaps.dm
+++ b/code/game/objects/structures/plasticflaps.dm
@@ -64,7 +64,7 @@
 	return 1 //diseases, stings, etc can pass
 
 /obj/structure/plasticflaps/CanPass(atom/movable/A, turf/T)
-	if(istype(A) && A.checkpass(PASSGLASS))
+	if(istype(A) && (A.pass_flags & PASSGLASS))
 		return prob(60)
 
 	var/obj/structure/bed/B = A
diff --git a/code/game/objects/structures/tables_racks.dm b/code/game/objects/structures/tables_racks.dm
index 40edea8ff4..6a481ea3ef 100644
--- a/code/game/objects/structures/tables_racks.dm
+++ b/code/game/objects/structures/tables_racks.dm
@@ -74,7 +74,7 @@
 		..()
 
 /obj/structure/table/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSTABLE))
+	if(istype(mover) && (mover.pass_flags & PASSTABLE))
 		return 1
 	if(mover.throwing)
 		return 1
@@ -87,7 +87,7 @@
 	. = !density
 	if(ismovableatom(caller))
 		var/atom/movable/mover = caller
-		. = . || mover.checkpass(PASSTABLE)
+		. = . || (mover.pass_flags & PASSTABLE)
 
 /obj/structure/table/proc/tablepush(mob/living/user, mob/living/pushed_mob)
 	pushed_mob.forceMove(src.loc)
@@ -423,7 +423,7 @@
 /obj/structure/rack/CanPass(atom/movable/mover, turf/target)
 	if(src.density == 0) //Because broken racks -Agouri |TODO: SPRITE!|
 		return 1
-	if(istype(mover) && mover.checkpass(PASSTABLE))
+	if(istype(mover) && (mover.pass_flags & PASSTABLE))
 		return 1
 	else
 		return 0
@@ -432,7 +432,7 @@
 	. = !density
 	if(ismovableatom(caller))
 		var/atom/movable/mover = caller
-		. = . || mover.checkpass(PASSTABLE)
+		. = . || (mover.pass_flags & PASSTABLE)
 
 /obj/structure/rack/MouseDrop_T(obj/O, mob/user)
 	if ((!( istype(O, /obj/item) ) || user.get_active_held_item() != O))
diff --git a/code/game/objects/structures/transit_tubes/transit_tube.dm b/code/game/objects/structures/transit_tubes/transit_tube.dm
index e409eb533b..f701d92360 100644
--- a/code/game/objects/structures/transit_tubes/transit_tube.dm
+++ b/code/game/objects/structures/transit_tubes/transit_tube.dm
@@ -14,7 +14,7 @@
 	var/enter_delay = 0
 
 /obj/structure/transit_tube/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	return !density
 
diff --git a/code/game/objects/structures/windoor_assembly.dm b/code/game/objects/structures/windoor_assembly.dm
index 520ba2ee69..b29df0aaf4 100644
--- a/code/game/objects/structures/windoor_assembly.dm
+++ b/code/game/objects/structures/windoor_assembly.dm
@@ -55,7 +55,7 @@
 	icon_state = "[facing]_[secure ? "secure_" : ""]windoor_assembly[state]"
 
 /obj/structure/windoor_assembly/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	if(get_dir(loc, target) == dir) //Make sure looking at appropriate border
 		return !density
@@ -78,7 +78,7 @@
 		return 1
 
 /obj/structure/windoor_assembly/CheckExit(atom/movable/mover as mob|obj, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	if(get_dir(loc, target) == dir)
 		return !density
diff --git a/code/game/objects/structures/window.dm b/code/game/objects/structures/window.dm
index 18073a6f6b..2b9494c535 100644
--- a/code/game/objects/structures/window.dm
+++ b/code/game/objects/structures/window.dm
@@ -120,7 +120,7 @@
 		..(FULLTILE_WINDOW_DIR)
 
 /obj/structure/window/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSGLASS))
+	if(istype(mover) && (mover.pass_flags & PASSGLASS))
 		return 1
 	if(dir == FULLTILE_WINDOW_DIR)
 		return 0	//full tile window, you can't move into it!
@@ -139,7 +139,7 @@
 	return 1
 
 /obj/structure/window/CheckExit(atom/movable/O as mob|obj, target)
-	if(istype(O) && O.checkpass(PASSGLASS))
+	if(istype(O) && (O.pass_flags & PASSGLASS))
 		return 1
 	if(get_dir(O.loc, target) == dir)
 		return 0
diff --git a/code/game/turfs/closed.dm b/code/game/turfs/closed.dm
index 66677c0877..1dc749dc70 100644
--- a/code/game/turfs/closed.dm
+++ b/code/game/turfs/closed.dm
@@ -16,7 +16,7 @@
 	return FALSE
 
 /turf/closed/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSCLOSEDTURF))
+	if(istype(mover) && (mover.pass_flags & PASSCLOSEDTURF))
 		return TRUE
 	else
 		..()
diff --git a/code/modules/client/client_defines.dm b/code/modules/client/client_defines.dm
index 5dfd9ecd4b..dbbe6ea512 100644
--- a/code/modules/client/client_defines.dm
+++ b/code/modules/client/client_defines.dm
@@ -21,7 +21,6 @@
 		/////////
 	var/datum/preferences/prefs = null
 	var/move_delay		= 1
-	var/moving			= null
 
 	var/area			= null
 
diff --git a/code/modules/hydroponics/grown/towercap.dm b/code/modules/hydroponics/grown/towercap.dm
index 0d35c7cb6e..168c929ed3 100644
--- a/code/modules/hydroponics/grown/towercap.dm
+++ b/code/modules/hydroponics/grown/towercap.dm
@@ -118,7 +118,7 @@
 	density = TRUE
 
 /obj/structure/bonfire/CanPass(atom/movable/mover, turf/target)
-	if(istype(mover) && mover.checkpass(PASSTABLE))
+	if(istype(mover) && (mover.pass_flags & PASSTABLE))
 		return TRUE
 	if(mover.throwing)
 		return TRUE
diff --git a/code/modules/mob/living/carbon/carbon_movement.dm b/code/modules/mob/living/carbon/carbon_movement.dm
index ed731408d8..e2555d4a8b 100644
--- a/code/modules/mob/living/carbon/carbon_movement.dm
+++ b/code/modules/mob/living/carbon/carbon_movement.dm
@@ -56,8 +56,6 @@
 			nutrition -= HUNGER_FACTOR/10
 			if(m_intent == MOVE_INTENT_RUN)
 				nutrition -= HUNGER_FACTOR/10
-		if((disabilities & FAT) && m_intent == MOVE_INTENT_RUN && bodytemperature <= 360)
-			bodytemperature += 2
 
 /mob/living/carbon/Moved(oldLoc, Dir)
 	. = ..()
diff --git a/code/modules/mob/living/carbon/human/human_movement.dm b/code/modules/mob/living/carbon/human/human_movement.dm
index 51de0c2d91..fc8fdac04c 100644
--- a/code/modules/mob/living/carbon/human/human_movement.dm
+++ b/code/modules/mob/living/carbon/human/human_movement.dm
@@ -56,8 +56,8 @@
 							FP.update_icon()
 						update_inv_shoes()
 				//End bloody footprints
-
 				S.step_action()
+
 /mob/living/carbon/human/Moved()
 	. = ..()
 	if(buckled_mobs && buckled_mobs.len && riding_datum)
diff --git a/code/modules/mob/living/living.dm b/code/modules/mob/living/living.dm
index 66869aa66a..589ebb0385 100644
--- a/code/modules/mob/living/living.dm
+++ b/code/modules/mob/living/living.dm
@@ -471,7 +471,6 @@
 		s_active.close(src)
 
 	if(lying && !buckled && prob(getBruteLoss()*200/maxHealth))
-
 		makeTrail(newloc, T, old_direction)
 
 /mob/living/movement_delay(ignorewalk = 0)
diff --git a/code/modules/mob/mob.dm b/code/modules/mob/mob.dm
index 4a83f5df89..0e49c8f6d4 100644
--- a/code/modules/mob/mob.dm
+++ b/code/modules/mob/mob.dm
@@ -395,7 +395,6 @@
 		pulling = null
 		grab_state = 0
 		update_pull_hud_icon()
-
 		if(isliving(ex_pulled))
 			var/mob/living/L = ex_pulled
 			L.update_canmove()// mob gets up if it was lyng down in a chokehold
@@ -676,8 +675,6 @@
 /mob/proc/canface()
 	if(!canmove)
 		return 0
-	if(client.moving)
-		return 0
 	if(world.time < client.move_delay)
 		return 0
 	if(stat==2)
diff --git a/code/modules/mob/mob_movement.dm b/code/modules/mob/mob_movement.dm
index ad38ba98ac..ee449b77a2 100644
--- a/code/modules/mob/mob_movement.dm
+++ b/code/modules/mob/mob_movement.dm
@@ -1,8 +1,8 @@
 /mob/CanPass(atom/movable/mover, turf/target)
+	if((mover.pass_flags & PASSMOB))
+		return TRUE
 	if(istype(mover, /obj/item/projectile) || mover.throwing)
 		return (!density || lying)
-	if(mover.checkpass(PASSMOB))
-		return TRUE
 	if(buckled == mover)
 		return TRUE
 	if(ismob(mover))
@@ -112,6 +112,7 @@
 
 #define MOVEMENT_DELAY_BUFFER 0.75
 #define MOVEMENT_DELAY_BUFFER_DELTA 1.25
+
 /client/Move(n, direct)
 	if(world.time < move_delay)
 		return FALSE
@@ -129,15 +130,13 @@
 	if(mob.stat == DEAD)
 		mob.ghostize()
 		return FALSE
-	if(moving)
-		return FALSE
 	if(mob.force_moving)
 		return FALSE
-	if(isliving(mob))
-		var/mob/living/L = mob
-		if(L.incorporeal_move)	//Move though walls
-			Process_Incorpmove(direct)
-			return FALSE
+
+	var/mob/living/L = mob  //Already checked for isliving earlier
+	if(L.incorporeal_move)	//Move though walls
+		Process_Incorpmove(direct)
+		return FALSE
 
 	if(mob.remote_control)					//we're controlling something, our movement is relayed to it
 		return mob.remote_control.relaymove(mob, direct)
@@ -162,7 +161,6 @@
 		return FALSE
 
 	//We are now going to move
-	moving = 1
 	var/delay = mob.movement_delay()
 	if (old_move_delay + (delay*MOVEMENT_DELAY_BUFFER_DELTA) + MOVEMENT_DELAY_BUFFER > world.time)
 		move_delay = old_move_delay + delay
@@ -181,8 +179,7 @@
 	else
 		. = ..()
 
-	moving = 0
-	if(mob && .)
+	if(.) // If mob is null here, we deserve the runtime
 		if(mob.throwing)
 			mob.throwing.finalize(FALSE)
 
@@ -190,8 +187,6 @@
 		for(var/obj/O in mob.user_movement_hooks)
 			O.intercept_user_move(direct, mob, n, oldloc)
 
-	return .
-
 /mob/Moved(oldLoc, dir, Forced = FALSE)
 	. = ..()
 	for(var/obj/O in contents)
diff --git a/code/modules/projectiles/projectile.dm b/code/modules/projectiles/projectile.dm
index d89da3e37b..bb26694021 100644
--- a/code/modules/projectiles/projectile.dm
+++ b/code/modules/projectiles/projectile.dm
@@ -405,7 +405,7 @@
 
 /obj/item/projectile/Crossed(atom/movable/AM) //A mob moving on a tile with a projectile is hit by it.
 	..()
-	if(isliving(AM) && (AM.density || AM == original) && !checkpass(PASSMOB))
+	if(isliving(AM) && (AM.density || AM == original) && !(src.pass_flags & PASSMOB))
 		Collide(AM)
 
 /obj/item/projectile/Destroy()