Add some un-push helpers

code/_onclick/click.dm

@@ -257,6 +257,9 @@
 	if(Adjacent(user))
 		user.start_pulling(src)
 
+/turf/CtrlClick(var/mob/user)
+	user.stop_pulling()
+
 /*
 	Alt click
 	Unused except for AI

code/modules/mob/mob_movement.dm

@@ -37,6 +37,9 @@
 			if(isliving(usr))
 				var/mob/living/carbon/C = usr
 				if(!C.get_active_hand())
+					if(C.pulling)
+						C.stop_pulling()
+						return
 					to_chat(usr, "<font color='red'>You have nothing to drop in your hand.</font>")
 					return
 				drop_item()