The Amityville Horror (1979) - 5 mistakes

Other: When George is in the basement, his son starts walking down the stairs. Suddenly a light bulb shatters right next to the boy's head, he screams, and falls violently down the stairs. But when it cuts to George coming over, he's just walking at a normal pace as though nothing happened. (This is just after they move in, before the evil spirits take hold of George, so there's no reason for him not to be alarmed.).

Continuity: When the dog is pulling George out of the black muck at the end, he's pulling on a piece of George's shirt. But when it cuts to another angle, the dog turns to run away and the piece of shirt is suddenly gone.

Continuity: At the end of the movie when the Lutzs' get in their van and drive off; they stop near a dead end sign when George gets out and goes back to get Harry. When he and Harry get back to the van and drive off, the van is farther from the dead end sign than it were before.

Audio problem: During the thunderstorm at the end, the thunder comes every couple of seconds, it doesn't correspond to the lightning at all, and it sounds exactly the same every time.

Continuity: In the scene where the two priests are driving to the Lutz house and the car goes out of control, they alternate between shots of Rod Steiger and Don Stroud. The car's windows switch between closed and open in various shots.