Continuity mistake: When Lynda is running out of the garden gate after an argument with her father, she throws the rake behind her. In the next scene, when her father steps on it, it is in a completely different position.
Continuity mistake: When Roxanne finds out the Charlie is the one writing the letters, she pushes him out the front door and when the camera angle changes to the outside she's pushing him again about 3 feet away from the front door.
Continuity mistake: When Valerie Vomit is about to steal the Pepsi truck, we see the driver standing behind the truck. In the next closeup we see a cord attached to his pants and the truck, which, as a result, rips his pants off as Valerie speeds off with the truck. Yet in the shot previous to this, there was no cord attached to his pants or the truck. (00:29:20)
Continuity mistake: In the first Slumber Party Massacre, Trish has the last name Devereaux. In this movie, Courtney refers to her as Trish Craven.
Continuity mistake: When the chimp, Goofy, is flying using the simulator, he's flying haphazardly and crashes into a red truck. He then turns and smiles at the trainer. In the next shot, he is flying haphazardly again.
Continuity mistake: When William Bill Towner says, "It looks like an alternate dimension or something," he is kneeling down with his hands on his knees. In the sequential shot he is standing.
Continuity mistake: After Todd Howard knocks out his opponent in the boxing match, the crowd immediately starts throwing cups of popcorn into the ring. The camera cuts to Todd cheering and then an overview shot of his opponent laying face down on the canvas. At that view you can see that there is no rubbish or popcorn or anything else in the ring. Then when the camera cuts back to a side view there is loads of rubbish and popcorn all over the place once again.
Continuity mistake: When the angel lands face down in the pool, Michael Knight turns her over and her face is completely dry.
Continuity mistake: While Ricky is on his shooting spree, he manages to shoot at an oncoming car, causing it to to crash and roll over. As the car rights itself, the driver and the car seats are visible. The right rear passenger window is also fully intact. Just before the car explodes, the driver has disappeared, along with the car seats and the same rear side window is now completely missing.
Continuity mistake: When George's wife asks him what made him drive all the way out here, their car is on the back of a large dinosaur at that moment. When it cuts to a closer angle for his reply, suddenly they are on a dirt road.
Continuity mistake: When Molly Ringwald is on the phone at the club and gets approached by the girl in orange, throughout the whole conversation the position of the phone receiver in Randy's hand is wildly inconsistent. (00:09:30 - 00:11:00)
Continuity mistake: During the scene when Bobby's auditioning for a part, there's a picture on the wall of Helen Martin (the lady playing Bobby's Grandma). The picture disappears and reappears during the scene.
Continuity mistake: When the pirates swears the oath to kill Dragon Mao, they drip blood on one of the pirate's hand. The blood stains on his hand differ between the shots. (00:02:50)