In the opening credits, it states the song that is being played is called "Head Over Meels" when in fact it is "Head Over Heels."
Doctor Anderson's car has European license plates instead of U.S. plates or more specifically, Massachusetts Plates.
Jared Martin's arm isn't near as hairy (he's human) as the gorilla prosthetic that's sliced when the slasher bursts into the room. where Robert and Jenny are trapped.