eh

code/__DEFINES/dcs/signals/atom/signals_movable.dm

@@ -11,6 +11,9 @@
 	#define COMPONENT_CANCEL_MOVE (1<<0)
 /// From /turf/open/gm/river/Entered(): (turf/open/gm/river/river, covered)
 #define COMSIG_MOVABLE_ENTERED_RIVER "movable_entered_river"
+/// From /atom/Cross(): (atom)
+#define COMSIG_MOVABLE_PRE_CROSSED "movable_pre_cross"
+	#define COMPONENT_IGNORE_CROSS (1<<0)
 
 ///from /mob/living/carbon/xenomorph/start_pulling(): (mob/living/carbon/xenomorph/X)
 #define COMSIG_MOVABLE_XENO_START_PULLING "movable_xeno_start_pulling"

code/game/turfs/transit.dm

@@ -136,9 +136,14 @@
 
 /atom/movable/proc/handle_paradrop(turf/target, dropship_name)
 	clear_active_explosives()
-	ADD_TRAIT(src, TRAIT_IMMOBILIZED, TRAIT_SOURCE_DROPSHIP_INTERACTION)
+	//ADD_TRAIT(src, TRAIT_IMMOBILIZED, TRAIT_SOURCE_DROPSHIP_INTERACTION)
 	ADD_TRAIT(src, TRAIT_UNDENSE, TRAIT_SOURCE_DROPSHIP_INTERACTION)
 	ADD_TRAIT(src, TRAIT_NO_STRAY, TRAIT_SOURCE_DROPSHIP_INTERACTION)
+	RegisterSignal(src, COMSIG_MOVABLE_PRE_CROSSED, PROC_REF(cancel_cross))
+	RegisterSignal(src, list(
+		COMSIG_LIVING_FLAMER_FLAMED,
+		COMSIG_LIVING_PREIGNITION
+	), PROC_REF(cancel_fire))
 	var/image/cables = image('icons/obj/structures/droppod_32x64.dmi', src, "chute_cables_static")
 	overlays += cables
 	var/image/chute = image('icons/obj/structures/droppod_64x64.dmi', src, "chute_static")
@@ -165,8 +170,14 @@
 	REMOVE_TRAIT(src, TRAIT_IMMOBILIZED, TRAIT_SOURCE_DROPSHIP_INTERACTION)
 	REMOVE_TRAIT(src, TRAIT_UNDENSE, TRAIT_SOURCE_DROPSHIP_INTERACTION)
 	REMOVE_TRAIT(src, TRAIT_NO_STRAY, TRAIT_SOURCE_DROPSHIP_INTERACTION)
+	UnregisterSignal(src, COMSIG_MOVABLE_PRE_CROSSED)
+	UnregisterSignal(src, COMSIG_LIVING_FLAMER_FLAMED)
 	overlays -= cables
 	overlays -= chute
+	for(var/atom/movable/atom in loc)
+		if(atom == src)
+			continue
+		atom.Cross(src)
 
 /atom/movable/proc/clear_active_explosives()
 	for(var/obj/item/explosive/explosive in contents)
@@ -234,6 +245,13 @@
 		death(last_damage_data)
 	status_flags |= PERMANENTLY_DEAD
 
+/atom/movable/proc/cancel_cross()
+	SIGNAL_HANDLER
+	return COMPONENT_IGNORE_CROSS
+
+/atom/movable/proc/cancel_fire()
+	SIGNAL_HANDLER
+	return COMPONENT_NO_BURN
 
 /turf/open/space/transit/dropship/alamo
 	shuttle_tag = DROPSHIP_ALAMO

code/modules/movement/movement.dm

@@ -140,11 +140,11 @@
 			destination.Entered(src, oldloc)
 			if(destarea && (old_area != destarea || !isturf(oldloc)))
 				destarea.Entered(src, oldloc)
-
-			for(var/atom/movable/AM in destination)
-				if(AM == src)
-					continue
-				AM.Crossed(src, oldloc)
+			if(!(SEND_SIGNAL(src, COMSIG_MOVABLE_PRE_CROSSED) & COMPONENT_IGNORE_CROSS))
+				for(var/atom/movable/AM in destination)
+					if(AM == src)
+						continue
+					AM.Crossed(src, oldloc)
 
 		Moved(oldloc, NONE, TRUE)
 		. = TRUE