Continuity mistake: When chasing Jamie in the woods, Mikey's headlights go from normal chevy headlights to off-road high beams.
Continuity mistake: After Tamara comes out of the the shower she is completely dry. (00:36:00)
Continuity mistake: There is no knife on the table when the wife enters the kitchen at the very end, however, she walks straight to Louis, hugs him and then magically a knife appears at the edge of the table which she picks up and uses to stab him (implied - the movie actually ends at that point).
Continuity mistake: When Art is eating breakfast at the Peterson's house, he takes items from the fridge. Watch when he comes back over and talks to Ray. The position of the pineapple under his arm changes from shot to shot. (00:10:40 - 00:11:25)
Continuity mistake: In the scene where Jonathan finds Cooper in the bathroom possessed, Cooper attacks John with a knife in his left hand. As Cooper lunges at him, John slams the door, but Cooper's left hand crashes through with little problem. But, there's no knife. The knife is now in Cooper's right hand. (01:05:42)
Continuity mistake: When Andre Toulon puts Blade into the suitcase, near the start of the film, Blade's hook is on his right hand but it is attached to his left hand in all other shots of him. (00:09:45)
Continuity mistake: When Alice and Mark are collecting all the sheets from the floor, Alice looks at a sheet about Amanda Krueger. Then in the next wide shot as her dad calls for her, all the sheets are in a pile to her right. Then in the following closeup, she starts picking up sheets of paper from all around her. (00:53:35)
Continuity mistake: In the last ten minutes, Sam Neil is on a raft and Nicole Kidman pulls him aboard a schooner while it is moving, getting Sam's blue shirt soaked. When the camera changes to aboard the schooner, his blue shirt is completely dry. His hair is very wet though.
Continuity mistake: When the devil sets Toxie on fire, there's a group of five people standing there with empty buckets. But in the next shot the buckets are filled with water.
Continuity mistake: After the shock waves, Snyder says he has a 'fire over here.' You see Scarpelli putting out the fire with a fire extinguisher. The hose is attached to the extinguisher, but a short time later she is holding the hose in her hand, then in the background a short time later you can see her, and the hose is again attached to the extinguisher.
Continuity mistake: When Lucas and his family are watching TV, Donna is sitting on the right side of the couch with her arm on the arm rest. When it cuts she has moved to the middle of the couch. (00:49:50)
Continuity mistake: When Angela, Snowboy and Peter are fishing, Peter puts a firecracker into the fish's mouth twice. (00:22:25)
Continuity mistake: When Fuller falls to his death, the mannequin used as his stand-in gets decapitated on its way down. It even makes a loud noise. When Fuller lands, however, his head is still on his shoulders.
Continuity mistake: When Tim gets stabbed, the killer's silhouette shows that he's holding his knife overhand. When he stabs Tim, he's holding the knife underhand.
Continuity mistake: During the graveyard battle, The Warlock throws Kassandra head first into a pond. In the next shot, she falls feet first. (01:31:45)