diff --git a/code/__defines/turfs.dm b/code/__defines/turfs.dm
index ef1956bdb64..6a4602ab254 100644
--- a/code/__defines/turfs.dm
+++ b/code/__defines/turfs.dm
@@ -12,3 +12,8 @@
 // Roof related flags
 #define ROOF_FORCE_SPAWN        1
 #define ROOF_CLEANUP            2
+
+// MultiZ faller control. (Bit flags.)
+// Default flag is needed for assoc lists to work.
+#define CLIMBER_DEFAULT 1
+#define CLIMBER_NO_EXIT 2
diff --git a/code/modules/admin/verbs/pray.dm b/code/modules/admin/verbs/pray.dm
index 382391ab973..46539d51ed3 100644
--- a/code/modules/admin/verbs/pray.dm
+++ b/code/modules/admin/verbs/pray.dm
@@ -31,12 +31,12 @@
 /proc/Centcomm_announce(var/msg, var/mob/Sender, var/iamessage)
 	var/msg_cciaa = "<span class='notice'><b><font color=orange>[uppertext(boss_short)][iamessage ? " IA" : ""]:</font>[key_name(Sender, 1)] (<A HREF='?_src_=holder;CentcommReply=\ref[Sender]'>RPLY</A>):</b> [msg]</span>"
 
-	msg = "<span class='notice'><b><font color=orange>[uppertext(boss_short)]M[iamessage ? " IA" : ""]:</font>[key_name(Sender, 1)] (<A HREF='?_src_=holder;adminplayeropts=\ref[Sender]'>PP</A>) (<A HREF='?_src_=vars;Vars=\ref[Sender]'>VV</A>) (<A HREF='?_src_=holder;subtlemessage=\ref[Sender]'>SM</A>) ([admin_jump_link(Sender, src)]) (<A HREF='?_src_=holder;secretsadmin=check_antagonist'>CA</A>) (<A HREF='?_src_=holder;BlueSpaceArtillery=\ref[Sender]'>BSA</A>) (<A HREF='?_src_=holder;CentcommReply=\ref[Sender]'>RPLY</A>):</b> [msg]</span>"
+	var/msg_admin = "<span class='notice'><b><font color=orange>[uppertext(boss_short)][iamessage ? " IA" : ""]:</font>[key_name(Sender, 1)] (<A HREF='?_src_=holder;adminplayeropts=\ref[Sender]'>PP</A>) (<A HREF='?_src_=vars;Vars=\ref[Sender]'>VV</A>) (<A HREF='?_src_=holder;subtlemessage=\ref[Sender]'>SM</A>) ([admin_jump_link(Sender, src)]) (<A HREF='?_src_=holder;secretsadmin=check_antagonist'>CA</A>) (<A HREF='?_src_=holder;BlueSpaceArtillery=\ref[Sender]'>BSA</A>) (<A HREF='?_src_=holder;CentcommReply=\ref[Sender]'>RPLY</A>):</b> [msg]</span>"
 	var/cciaa_present = 0
 	var/cciaa_afk = 0
 	for(var/client/C in admins)
 		if(R_ADMIN & C.holder.rights)
-			C << msg
+			C << msg_admin
 		else if (R_CCIAA & C.holder.rights)
 			cciaa_present++
 			if (C.is_afk())
diff --git a/code/modules/clothing/spacesuits/rig/modules/utility.dm b/code/modules/clothing/spacesuits/rig/modules/utility.dm
index a2c60aa10f5..b66d1c5929a 100644
--- a/code/modules/clothing/spacesuits/rig/modules/utility.dm
+++ b/code/modules/clothing/spacesuits/rig/modules/utility.dm
@@ -566,7 +566,7 @@
 
 	// Handle leaping at targets with a combat capable version here.
 	if (combatType && dist && (ismob(target) || (locate(/mob/living) in T)))
-		H.leap(target, leapDistance)
+		H.do_leap(target, leapDistance, FALSE)
 		return 1
 
 	// If dist -> horizontal leap. Otherwise, the user clicked the turf that they're
@@ -600,7 +600,7 @@
 
 		// This setting is necessary even for combat type, to stop you from moving onto
 		// the turf, falling back down, and then getting forcemoved to the final destination.
-		LAZYADD(TA.climbers, H)
+		TA.add_climber(H, CLIMBER_NO_EXIT)
 
 		H.forceMove(TA)
 
@@ -612,9 +612,13 @@
 			if (!do_after(H, 4 SECONDS, use_user_turf = TRUE))
 				H.visible_message("<span class='warning'>\The [H] is interrupted and falls!</span>",
 					"<span class='danger'>You are interrupted and fall back down!</span>")
-				LAZYREMOVE(TA.climbers, H)
 
-				ADD_FALLING_ATOM(H)
+				// Climbers will auto-fall if they exit the turf. This is for in case
+				// something else interrupts them.
+				if (H.loc == TA)
+					TA.remove_climber(H)
+					ADD_FALLING_ATOM(H)
+
 				return 1
 
 			H.visible_message("<span class='notice'>\The [H] finishes climbing onto \the [leapEnd].</span>",
@@ -623,7 +627,7 @@
 			H.visible_message("<span class='warning'>\The [H] lands on \the [leapEnd] with a heavy slam!</span>",
 				"<span class='warning'>You land on \the [leapEnd] with a heavy thud!</span>")
 
-		LAZYREMOVE(TA.climbers, H)
+		// open/Exited() removes from climbers.
 		H.forceMove(leapEnd)
 
 		return 1
diff --git a/code/modules/mob/freelook/ai/update_triggers.dm b/code/modules/mob/freelook/ai/update_triggers.dm
index 63ff0e292a5..2fe2a40a381 100644
--- a/code/modules/mob/freelook/ai/update_triggers.dm
+++ b/code/modules/mob/freelook/ai/update_triggers.dm
@@ -9,11 +9,11 @@
 /mob/living/silicon/robot/Move()
 	var/oldLoc = src.loc
 	. = ..()
-	//if(.)
-	if(provides_camera_vision())
-		if(!updating)
-			updating = 1
-			addtimer(CALLBACK(src, .proc/camera_post_move, oldLoc), BORG_CAMERA_BUFFER)
+	if (.)
+		if(provides_camera_vision())
+			if(!updating)
+				updating = 1
+				addtimer(CALLBACK(src, .proc/camera_post_move, oldLoc), BORG_CAMERA_BUFFER)
 
 /mob/living/silicon/robot/proc/camera_post_move(oldLoc)
 	if (oldLoc != loc)
@@ -24,9 +24,9 @@
 /mob/living/silicon/ai/Move()
 	var/oldLoc = src.loc
 	. = ..()
-	//if(.)
-	if(provides_camera_vision())
-		addtimer(CALLBACK(src, .proc/camera_post_move, oldLoc), BORG_CAMERA_BUFFER, TIMER_UNIQUE)
+	if (.)
+		if(provides_camera_vision())
+			addtimer(CALLBACK(src, .proc/camera_post_move, oldLoc), BORG_CAMERA_BUFFER, TIMER_UNIQUE)
 
 /mob/living/silicon/ai/proc/camera_post_move(oldLoc)
 	if(oldLoc != src.loc)
diff --git a/code/modules/mob/living/carbon/human/human_powers.dm b/code/modules/mob/living/carbon/human/human_powers.dm
index 3bdc97c1498..93203a05559 100644
--- a/code/modules/mob/living/carbon/human/human_powers.dm
+++ b/code/modules/mob/living/carbon/human/human_powers.dm
@@ -49,72 +49,79 @@
 		if ((O.client && !( O.blinded )))
 			O.show_message(text("<span class='danger'>[] [failed ? "tried to tackle" : "has tackled"] down []!</span>", src, T), 1)
 
-/mob/living/carbon/human/proc/leap(var/mob/living/T = null, var/max_range = 4)
+/mob/living/carbon/human/proc/leap(mob/living/T as mob in view(4))
 	set category = "Abilities"
 	set name = "Leap"
 	set desc = "Leap at a target and grab them aggressively."
 
-	if(last_special > world.time)
-		return
+	do_leap(T)
+
+/mob/living/carbon/human/proc/do_leap(mob/living/T, max_range = 4, restrict_special = TRUE)
+	if(restrict_special && last_special > world.time)
+		src << "<span class='notice'>You're too tired to leap!</span>"
+		return FALSE
+
+	if (status_flags & LEAPING)
+		src << "<span class='warning'>You're already leaping!</span>"
+		return FALSE
 
 	if(stat || paralysis || stunned || weakened || lying || restrained() || buckled)
-		src << "You cannot leap in your current state."
-		return
+		src << "<span class='warning'>You cannot leap in your current state.</span>"
+		return FALSE
 
-	if (!T)
+	if (!T || issilicon(T)) // Silicon targets require us to rebuild the list.
 		var/list/choices = list()
-		for(var/mob/living/M in view(6,src))
+		for(var/mob/living/M in view(max_range, src))
 			if(!istype(M,/mob/living/silicon))
 				choices += M
 		choices -= src
 
 		T = input(src,"Who do you wish to leap at?") as null|anything in choices
 
-	if(!T || !src || src.stat) return
+	if(!T || QDELETED(src) || stat)
+		return FALSE
 
-	if(get_dist(get_turf(T), get_turf(src)) > max_range) return
+	if(get_dist(get_turf(T), get_turf(src)) > max_range)
+		src << "<span class='warning'>[T] is too far away!</span>"
+		return FALSE
 
-	if(last_special > world.time)
-		return
+	if (restrict_special)
+		last_special = world.time + 75
 
-	if(stat || paralysis || stunned || weakened || lying || restrained() || buckled)
-		src << "You cannot leap in your current state."
-		return
-
-	last_special = world.time + 75
 	status_flags |= LEAPING
 
-	src.visible_message("<span class='danger'>\The [src] leaps at [T]!</span>")
-	src.throw_at(get_step(get_turf(T),get_turf(src)), 4, 1, src)
+	visible_message("<span class='danger'>[src] leaps at [T]!</span>", "<span class='danger'>You leap at [T]!</span>")
+	throw_at(get_step(get_turf(T), get_turf(src)), 4, 1, src)
 
 	// Only Vox get to shriek. Seriously.
 	if (isvox(src))
-		playsound(src.loc, 'sound/voice/shriek1.ogg', 50, 1)
+		playsound(loc, 'sound/voice/shriek1.ogg', 50, 1)
 
 	sleep(5)
 
-	if(status_flags & LEAPING) status_flags &= ~LEAPING
+	if(status_flags & LEAPING)
+		status_flags &= ~LEAPING
 
 	if(!src.Adjacent(T))
 		src << "<span class='warning'>You miss!</span>"
-		return
+		return FALSE
 
 	T.Weaken(3)
 
 	// Pariahs are not good at leaping. This is snowflakey, pls fix.
 	if(species.name == "Vox Pariah")
 		src.Weaken(5)
-		return
+		return TRUE
 
 	var/use_hand = "left"
 	if(l_hand)
 		if(r_hand)
 			src << "<span class='danger'>You need to have one hand free to grab someone.</span>"
-			return
+			return TRUE
 		else
 			use_hand = "right"
 
-	src.visible_message("<span class='warning'><b>\The [src]</b> seizes [T] aggressively!</span>")
+	visible_message("<span class='warning'><b>[src]</b> seizes [T] aggressively!</span>", "<span class='warning'>You aggressively seize [T]!</span>")
 
 	var/obj/item/weapon/grab/G = new(src,T)
 	if(use_hand == "left")
@@ -126,6 +133,8 @@
 	G.icon_state = "grabbed1"
 	G.synch()
 
+	return TRUE
+
 /mob/living/carbon/human/proc/gut()
 	set category = "Abilities"
 	set name = "Gut"
diff --git a/code/modules/mob/living/silicon/silicon.dm b/code/modules/mob/living/silicon/silicon.dm
index 16901b62493..83d203ec19c 100644
--- a/code/modules/mob/living/silicon/silicon.dm
+++ b/code/modules/mob/living/silicon/silicon.dm
@@ -367,7 +367,7 @@
 		cameraFollow = null
 
 /mob/living/silicon/Move(newloc, direct)
-	..(newloc,direct)
+	. = ..()
 	if (underdoor)
 		underdoor = 0
 		if ((layer == UNDERDOOR))//if this is false, then we must have used hide, or had our layer changed by something else. We wont do anymore checks for this move proc
diff --git a/code/modules/multiz/structures.dm b/code/modules/multiz/structures.dm
index 4ccc6cfd81b..5a0f53fa558 100644
--- a/code/modules/multiz/structures.dm
+++ b/code/modules/multiz/structures.dm
@@ -43,7 +43,9 @@
 
 /obj/structure/ladder/attackby(obj/item/C as obj, mob/user as mob)
 	attack_hand(user)
-	return
+
+/obj/structure/ladder/attack_robot(mob/user)
+	attack_hand(user)
 
 /obj/structure/ladder/attack_hand(var/mob/M)
 	if(!M.may_climb_ladders(src))
@@ -102,6 +104,19 @@
 		return FALSE
 	return TRUE
 
+/mob/living/silicon/may_climb_ladders(ladder)
+	to_chat(src, "<span class='warning'>You're too heavy to climb [ladder]!</span>")
+	return FALSE
+
+/mob/living/silicon/robot/drone/may_climb_ladders(ladder)
+	if(!Adjacent(ladder))
+		to_chat(src, "<span class='warning'>You need to be next to \the [ladder] to start climbing.</span>")
+		return FALSE
+	if(incapacitated())
+		to_chat(src, "<span class='warning'>You are physically unable to climb \the [ladder].</span>")
+		return FALSE
+	return TRUE
+
 /mob/observer/ghost/may_climb_ladders(var/ladder)
 	return TRUE
 
diff --git a/code/modules/multiz/turf.dm b/code/modules/multiz/turf.dm
index 48a3071f6b8..6e91657e5e5 100644
--- a/code/modules/multiz/turf.dm
+++ b/code/modules/multiz/turf.dm
@@ -54,10 +54,32 @@
 		if (mover.Check_Shoegrip(FALSE) && mover.can_fall(below, src))
 			to_chat(mover, span("notice",
 				"You are stopped from falling off the edge by \the [mover.shoes] you're wearing!"))
-			return 0
+			return FALSE
 
 	return ..()
 
+// Add a falling atom by default. Even if it's not an atom that can actually fall.
+// SSfalling will check this on its own and remove if necessary. This is saner, as it
+// centralizes control to SSfalling.
+/turf/simulated/open/Entered(atom/movable/mover)
+	..()
+	ADD_FALLING_ATOM(mover)
+	update_icon()
+
+// Override to deny a climber exit if they're set to adhere to CLIMBER_NO_EXIT
+/turf/simulated/open/Exit(atom/movable/mover, atom/newloc)
+	var/flags = remove_climber(mover)
+
+	if (flags & CLIMBER_NO_EXIT)
+		ADD_FALLING_ATOM(mover)
+		return FALSE
+
+	return ..()
+
+// Remove from climbers just in case.
+/turf/simulated/open/Exited(atom/movable/mover, atom/newloc)
+	LAZYREMOVE(climbers, mover)
+
 /turf/simulated/open/Destroy()
 	SSopenturf.openspace_turfs -= src
 	SSopenturf.queued_turfs -= src
@@ -95,6 +117,42 @@
 
 	return FALSE
 
+/**
+ * Used to add a climber to the climbers list. Climbers do not fall down this specific tile.
+ *
+ * @param climber The atom to be added as a climber.
+ * @param flags Bitflags to control the status of the climber. Should always be non-0!
+ *
+ * @return TRUE if a climber was successfully added. FALSE if the climber is already
+ * present or an error occured.
+ */
+/turf/simulated/open/proc/add_climber(atom/climber, flags = CLIMBER_DEFAULT)
+	if (!flags)
+		PROCLOG_WEIRD("Attempted to add climber [climber] without flags.")
+		return FALSE
+
+	if (LAZYACCESS(climbers, climber))
+		return FALSE
+
+	LAZYINITLIST(climbers)
+	climbers[climber] = flags
+	return TRUE
+
+/**
+ * Used to remove a climber from the climbers list. Returns the flags the climber
+ * was assigned.
+ *
+ * @param climber The atom to be removed from climbers.
+ *
+ * @return The flags assigned to the climber if it was present in the list. 0 otherwise.
+ */
+/turf/simulated/open/proc/remove_climber(atom/climber)
+	. = 0
+
+	if (LAZYACCESS(climbers, climber))
+		. = climbers[climber]
+		LAZYREMOVE(climbers, climber)
+
 /turf/simulated/open/airless
 	oxygen = 0
 	nitrogen = 0
@@ -127,11 +185,6 @@
 /turf/simulated/open/update_dirt()
 	return 0
 
-/turf/simulated/open/Entered(atom/movable/mover)
-	..()
-	ADD_FALLING_ATOM(mover)
-	update_icon()
-
 // override to make sure nothing is hidden
 /turf/simulated/open/levelupdate()
 	for(var/obj/O in src)
diff --git a/code/modules/shieldgen/shield_gen.dm b/code/modules/shieldgen/shield_gen.dm
index eb3fe5fd1a1..a6b6bfa634a 100644
--- a/code/modules/shieldgen/shield_gen.dm
+++ b/code/modules/shieldgen/shield_gen.dm
@@ -43,7 +43,7 @@
 		field.Remove(D)
 		D.loc = null
 	return ..()
-	
+
 /obj/machinery/shield_gen/emag_act(var/remaining_charges, var/mob/user)
 	if(prob(75))
 		src.locked = !src.locked
@@ -237,25 +237,9 @@
 //TODO MAKE THIS MULTIZ COMPATIBLE
 //grab the border tiles in a circle around this machine
 /obj/machinery/shield_gen/proc/get_shielded_turfs()
-	var/list/out = list()
-
 	var/turf/gen_turf = get_turf(src)
+
 	if (!gen_turf)
 		return
 
-	var/turf/T
-	for (var/x_offset = -field_radius; x_offset <= field_radius; x_offset++)
-		T = locate(gen_turf.x + x_offset, gen_turf.y - field_radius, gen_turf.z)
-		if (T) out += T
-
-		T = locate(gen_turf.x + x_offset, gen_turf.y + field_radius, gen_turf.z)
-		if (T) out += T
-
-	for (var/y_offset = -field_radius+1; y_offset < field_radius; y_offset++)
-		T = locate(gen_turf.x - field_radius, gen_turf.y + y_offset, gen_turf.z)
-		if (T) out += T
-
-		T = locate(gen_turf.x + field_radius, gen_turf.y + y_offset, gen_turf.z)
-		if (T) out += T
-
-	return out
+	. = RANGE_TURFS(field_radius, gen_turf)
diff --git a/code/modules/shieldgen/shield_gen_external.dm b/code/modules/shieldgen/shield_gen_external.dm
index 182339d64e5..4264b8579b7 100644
--- a/code/modules/shieldgen/shield_gen_external.dm
+++ b/code/modules/shieldgen/shield_gen_external.dm
@@ -11,17 +11,27 @@
 //Search for space turfs within range that are adjacent to a simulated turf.
 /obj/machinery/shield_gen/external/get_shielded_turfs()
 	var/list/out = list()
-	
+
 	var/turf/gen_turf = get_turf(src)
 	if (!gen_turf)
 		return
-	
+
+	var/turf/U
 	var/turf/T
-	for (var/x_offset = -field_radius; x_offset <= field_radius; x_offset++)
-		for (var/y_offset = -field_radius; y_offset <= field_radius; y_offset++)
-			T = locate(gen_turf.x + x_offset, gen_turf.y + y_offset, gen_turf.z)
-			if (istype(T, /turf/space))
-				//check neighbors of T
-				if (locate(/turf/simulated/) in orange(1, T))
-					out += T
+
+	for (var/tt in RANGE_TURFS(field_radius, gen_turf))
+		T = tt
+		// Ignore station areas.
+		if (the_station_areas[T.loc])
+			continue
+		else if (istype(T, /turf/space) || istype(T, /turf/simulated/floor/asteroid) || isopenturf(T))
+			for (var/uu in RANGE_TURFS(1, T))
+				U = uu
+				if (T == U)
+					continue
+
+				if (the_station_areas[U.loc])
+					out += U
+					break
+
 	return out