Added "hide" verb to mousetraps, placing them on the same layer as hidden mice.

Triggered mousetraps and dead mice will be moved back to the top layer.

Monkeys will no longer move randomly while being pulled.

code/modules/assembly/mousetrap.dm

@@ -45,6 +45,7 @@
 			visible_message("\red <b>SPLAT!</b>")
 			M.splat()
 		playsound(target.loc, 'sound/effects/snap.ogg', 50, 1)
+		layer = MOB_LAYER - 0.2
 		armed = 0
 		update_icon()
 		pulse(0)
@@ -112,4 +113,16 @@
 
 /obj/item/device/assembly/mousetrap/armed
 	icon_state = "mousetraparmed"
-	armed = 1
+	armed = 1
+
+
+/obj/item/device/assembly/mousetrap/verb/hide_under()
+	set src in oview(1)
+	set name = "Hide"
+	set category = "Object"
+
+	if(usr.stat)
+		return
+
+	layer = TURF_LAYER+0.2
+	usr << "<span class='notice'>You hide [src].</span>"