Revealing mistake: When the man pushes Leroy's body down the basement stairs, as his body is sliding down, when it's almost to the bottom, you can plainly see Leroy lift his head up as he's sliding, although he's dead.
Revealing mistake: When John tries to stop the van while Maggie is driving, because he sees the small girl in the road, as the van screeches around the road, you can see the road is covered in tyremarks from previous takes. (00:20:10)
Visible crew/equipment: At the beginning when Chuckie is turning on all the toys in the office, he flies a helicopter and the string is so visible its funny. The helicopter then crashes and you can still see it. In the next shot the man looks at it and there is no string. (00:11:15)
Continuity mistake: When De Niro first meets Nolte's lady-friend, they are having a conversation in a bar or restaurant. As the camera goes from De Niro to the woman, the woman's top blouse button is open in one shot, then closed, then open, etc.
Revealing mistake: When Toulon's puppet stage is set on fire, the flames in the foreground look rather like they are projected from a regularly set row of blow torches, rather than erratically flickering flames on a wooden floor. (00:25:05)
Continuity mistake: Right before Ernest falls into his trash truck you can see that it is full of a good mixture of trash, i.e. white trash bags, food containers, etc. But when the camera angle cuts and he lands in the trash, it has now changed to all cardboard boxes.
Continuity mistake: The position and intactness of the biscuits changes between shots, as Louison puts the sugar pot on the biscuit plate because the tea begins to overspill from the cup. (00:27:20)
Continuity mistake: When the killer rips his mask off to expose his face to Maggie, his eyes go from brown to yellow between shots. It is explained later that his yellow eyes becomes brown thanks to colored contact lenses, but the killer does not remove any contacts when rips off his mask.
Continuity mistake: When the old woman is cooking she is stirring the casserole. When it cuts she is spicing the food. (00:20:45)
Visible crew/equipment: When Wanda comes into the room and Blade comes after her, a lamp drops off the table when she knocks it, but before it completely falls, a crewmember's hand can be seen grabbing it. (01:04:15)
Revealing mistake: When the devil man (Bruce Payne) comes up from under his couch in his caravan, and pushes the mayor through the ceiling - they make no attempt to hide the fact that it is a dummy and its hands are gripping some special handles.
Visible crew/equipment: During the scene where the grandmother and the monsters stop at a variety store in the tinted bus a camera man can be seen. As the bus pulls away, you can see the camera man standing there filming the scene quite clearly in the reflection of the bus windows as it pulls away. (00:24:30)
Character mistake: In the very first scene, in the first shot you see a sign in Spanish that says "NO PASE por orden del departamento de arquiologia". The correct Spanish word is arqueologia.
Visible crew/equipment: When Brown's limo leaves the scene following Speed's police car, set lights and camera crew are reflected in the side of the vehicle. (00:59:25)