Fixes #5390

code/modules/mob/living/simple_animal/hostile/retaliate/drone.dm

@@ -277,3 +277,24 @@
 
 /obj/item/projectile/beam/pulse/drone
 	damage = 10
+
+/obj/item/projectile/beam/drone/after_move()
+	var/turf/T = get_turf(src)
+	var/mob/living/carbon/human/H = locate() in T
+	if(!H)
+		return 0
+	if(H.lying)
+		Bump(H, 1)	// Force the bump since mobs lying don't trigger it.  We'll only do this for drones since they don't target the mob they target the turf.
+		return 1
+	return 0
+
+/obj/item/projectile/beam/pulse/drone/after_move()
+	var/turf/T = get_turf(src)
+	var/mob/living/carbon/human/H = locate() in T
+	if(!H)
+		return 0
+	if(H.lying)
+		Bump(H, 1)      // Force the bump since mobs lying don't trigger it.  We'll only do this for drones since they don't target the mob they target the turf.
+		return 1
+	return 0
+

code/modules/projectiles/projectile.dm

@@ -298,6 +298,8 @@
 
 		before_move()
 		Move(location.return_turf())
+		if(after_move())
+			return 1
 
 		if(!bumped && !isturf(original))
 			if(loc == get_turf(original))
@@ -315,7 +317,10 @@
 			sleep(step_delay)	//add delay between movement iterations if it's not a hitscan weapon
 
 /obj/item/projectile/proc/before_move()
-	return
+	return 0
+
+/obj/item/projectile/proc/after_move()
+	return 0
 
 /obj/item/projectile/proc/setup_trajectory(turf/startloc, turf/targloc, var/x_offset = 0, var/y_offset = 0)
 	// setup projectile state