Revealing mistake: After the woman is strangled and the people come in trying to find the little kid, the dead woman is clearly seen blinking. (00:11:25)
Revealing mistake: When the cop drops off Brandy's dad and it first shows him with no leg, you can see his real leg behind him.
Revealing mistake: When Rita pulls the first stack of hundreds out of her purse, she puts it down next to her. The bill on top is very close to looking real, but the bill underneath is very fake looking. (00:44:15)
Revealing mistake: When David is sitting in L.E. at the end and the camera is zooming in on his face his mask changes. In the very last shot of him just about to pull it off it's much wider/looser so it'll come off easier.
Revealing mistake: When Gretchen gets run over, you can tell that a dummy was used as the car's wheels pass over her. The position of her head changes between shots and her body seems a little too still for a living person who's just been run over. She should have been tossed a few feet or maybe even gotten caught under the car's wheels.
Revealing mistake: When the monsters approach The Cyber gang outside the arcade, Cyber Scooby (who wears the red color) is seen in a blue color in one of the shots facing the arcade.
Revealing mistake: When Paul is in the car trying to escape, he hits one of the villagers. The man is obviously yanked back by a harness before the car hits him.
Revealing mistake: Just as Liz goes to talk to Mike (where she talks about slitting their wrists with Geoff's knife) Geoff is in the foreground of the shot, covered in a coat/blanket/something, and is supposed to be dead. But you can see his stomach and chest moving as the actor breathes. (01:25:05)
Revealing mistake: In the scene where unit 91 is calling in the Spurbury Police car, it is obvious the car's ignition is not turned on.
Revealing mistake: When Rick puts Ray on the table at the brick plant, he stands him up and lies him down. Right before he puts him onto the table, Ray lifts his leg up to assist Rick to get him up there.