Continuity mistake: Wayne breaks the second cockroach turd while there's a round black object behind. When the cockroach appears, the shot changes to a panoramic view, and the object vanishes, only to reappear in the close-ups.
Continuity mistake: Before the cockroach scene, Wayne finds a pin and walks away from the group. An instant cut later, the group is suddenly closer to him and also closer together.
Continuity mistake: When Wayne is about to test the machine, Gordon is holding the computer screen. In the close-up, his hand disappears.
Continuity mistake: When the group is in the toy car, they freak out when they see a bulldozer running down a ramp about to crash against them. The problem is, all the front shots of them show that they left the ramp behind and the bulldozer had already crossed the track.
Revealing mistake: When the boys take the laundry basket upstairs, there's a shot from in front, and one can see none of the four family members is inside. The filmmakers didn't even bother to place toy figures inside.
Continuity mistake: When Jenny holds the magnifying glass, her hand and Mitch's disappear in the close-up. (01:07:49)
Continuity mistake: Ricky kisses Jenny, leaning his head to the right. A shot later, it's leaning to the left.
Continuity mistake: Wayne climbs inside the Hi fi system and steps on the left side of the aluminium foil. A shot later, he is on the far right side, not stepping on it. The way the foil folds also changes.
Revealing mistake: While Patti and Diane talk next to the spider, in the close-up shot, the web becomes a thick white rope that has nothing to do with what we see in the wide angles.
