Continuity mistake: In the beginning when the killer is trying to kill Cotton, he pulls a book case on the killer, but if you look carefully you see that the killer slides to the side, despite the fact that the book case is meant to have hit him.
Continuity mistake: When Christine gets out of the shower at Cotton's apartment she has dried off, stood and walked on the carpet, and put on a nightie. When the stereo starts blasting and she walks down the hardwood floored hallway her feet leave very wet footprints which she slips in later when the killer chases her back up the hallway.
Continuity mistake: The second time Gale shows up at Jennifer's driveway (right before the place blows up), one can clearly hear her turn off the lights and remove the keys from her car. Yet, when she opens the door, the car still makes that beeping noise that happens when you leave your headlights on or leave your ignition key in the ignition. (00:37:10)
Continuity mistake: When Sarah tries to fix Roman's statue's head, her hair is over her face, when she goes to answer the phone her hair is pulled back behind her ear. (00:23:20)
Continuity mistake: In the scene where Jennifer gets killed and falls through the mirror look at Dewey's hair it's all messed up, but in the scene right after that when Dewey and Gale are looking for Tyson his hair's all combed back again.
Continuity mistake: Dewey rolls down a hill after shooting at the killer. The cut on his forehead changes shape from circular to two parallel lines then to a straight line and a waved one.
Continuity mistake: At the part where Sidney is on the set of her house and the killer is chasing her up the stairs, she runs right by the plants, but in the next take she is right next to the plants just about to throw one.