This mistake is in the episode where Corey tricks his parents into thinking his babysitter will be late so he could stay home alone. Later in the episode when Corey is watching a scary movie and the power goes out, Tanya is banging on the door trying to find the spare key. She eventually found it and put it in the door. You can CLEARLY hear the lock twist and click...but watch the lock before and after the key goes in....IT DOESN'T MOVE!!!!!Talk about a fake set...