componentization part 1: "The flawed theorical code"

code/game/machinery/_machinery.dm

@@ -175,6 +175,7 @@ Class Procs:
 		if(isliving(A))
 			var/mob/living/L = A
 			L.update_canmove()
+	SEND_SIGNAL(src, COMSIG_MACHINE_EJECT_OCCUPANT, occupant)
 	occupant = null
 
 /obj/machinery/proc/close_machine(atom/movable/target = null)
@@ -479,6 +480,7 @@ Class Procs:
 /obj/machinery/Exited(atom/movable/AM, atom/newloc)
 	. = ..()
 	if (AM == occupant)
+		SEND_SIGNAL(src, COMSIG_MACHINE_EJECT_OCCUPANT, occupant)
 		occupant = null
 
 /obj/machinery/proc/adjust_item_drop_location(atom/movable/AM)	// Adjust item drop location to a 3x3 grid inside the tile, returns slot id from 0 to 8

code/game/machinery/exp_cloner.dm

@@ -52,7 +52,7 @@
 	var/list/candidates = pollCandidatesForMob("Do you want to play as [clonename]'s defective clone?", null, null, null, 100, H)
 	if(LAZYLEN(candidates))
 		var/mob/dead/observer/C = pick(candidates)
-		H.key = C.key
+		C.transfer_key(H)
 
 	if(grab_ghost_when == CLONER_FRESH_CLONE)
 		H.grab_ghost()