Factual error: When the camera shows the coffee cup in the cop's car, you can see the ignition is in the off position

Revealing: When the coffee cup tips over onto Officer Burke's lap, you can see the device that was making it vibrate.

Revealing: In the scene where Nora's son gets killed, we can see the boy under the falling piece of glass. But in the shot where this piece is just about to smash him, you can see on the DVD edition that there is a dummy instead of him because his arms are too long relatively to the whole body and also the hands are obviously not human.

Continuity: In the scene where the lottery winner is going to die, watch the beer bottle he takes out of the fridge, it moves all over the place. It even vanishes a couple of times.