Revealing mistake: In the last scene of the film where the Reverend is holding up the glass jar with the mini-blob in it, you can see the mechanism being used to move the blob (look between the Reverend's fingers). (01:30:30)
Visible crew/equipment: In the bathroom, when Mike's ex-girlfriend is getting undressed to take a shower a long-necked clown jumps from out of the toilet. Anyone, and I mean anyone, can clearly see the arm of a white guy sticking out of the bottom of the clown's neck controlling the puppet.
Continuity mistake: When Valmont visits Madame de Tourvel and enters her room, there's a servant standing next to Valmont who appears to leave and you hear the door close. In the next scene he is still standing there with the door closed and then takes Valmont's hat, opens the door, and leaves.
Factual error: At the end, when Cyndi Lauper touches the glowing pyramid, goes into a trance, and starts translating the inscription, Jeff Goldblum pulls her off and she doesn't finish it. One of the bad guys says that what Cyndi already said will be enough to help him decode the rest and that it's just a matter of "cartography" now. He should have said "cryptography" (skill of decoding secret writings) and not "cartography" (which has to do with making maps).
Suggested correction: Even though the guy's fake accent is terrible, he actually says "cryptography" in this scene, not "cartography."
Continuity mistake: Sergeant Parker is thrown through the air with his boots on, yet we are shown the dead hobgoblins beside his smoldering boots.
Continuity mistake: When Toto is a child, he is left handed. But as a young man, he is right handed.
Continuity mistake: Jesse sneaks downstairs so that he can go out, but the doorbell rings, so he hides in a closet. As he walks down the stairs, there is a table with a white pot on the edge of it. In the next shot it's in the centre. (00:17:55)
Continuity mistake: When Jackie, Tim and Luke are at the bar, the bartender places a glass of milk beside Jackie's right hand. When it cuts, it's between his hands. (00:36:15)
Factual error: Ivan Danko's police uniform is a combination of at least six different uniforms. His hat is a Moscow Commander's Special and he also wears a Parade Band Musician axelbant.
Continuity mistake: In the scene where Ken is picking Rita up from school her bookbag is red with 2 triangles on it as they go around the school, after Rita gets on, her bookbag then turns blue with no triangles.
Continuity mistake: In the first club session, where Winkelmann presides, a pair of glasses appears in the pocket of his jacket right before he puts them on. (00:10:55)
Deliberate mistake: As the Soviet tank starts rolling, the tank commander obviously uses a hidden step to mount the tank. Soviet T-55/T-62 type tanks did not have steps for mounting by the wheels and axles; to mount a rolling tank using the moving wheels or spinning axles would result in the mounter being immediately crushed and killed.
Audio problem: 99% of Mooch's drumming is not in synch with the drumming sounds, especially the ride and crash cymbals.
Continuity mistake: When Rei is impaled in the chair, the amount of blood on her clothes changes. Blood all over her right arm vanishes by the end.
Continuity mistake: Right before Steve Martin and Michael Caine make their bet, Steve walks up to Michael sitting at a little white table. Every time the camera goes back to face Michael his handkerchief in the breast pocket of his jacket goes from sticking way out of his jacket, to barely visible.
Visible crew/equipment: Near the end when Wilford and Don and Kitty are about to sneak into the Oceanic Center, they are scoping out the scene. As they turn the corner, the shot changes to a shot mounted on the hood looking right at Wilford. You can make out the top of the camera's shadow near the right windshield wiper. (01:30:45)
Audio problem: When CC first meets Hilary, CC is under the boardwalk. As CC talks, the audio is ahead of her mouth movements, and when she says "Ritzy or Cheap?" her mouth is completely shut.
Revealing mistake: At the beginning of the film, young men headed to basic training in Biloxi, Mississippi are shown on a train crossing a river. The name of the train is visible and easy to read. At the end of the film, the men are leaving Mississippi. The scene shows the train crossing the same river, but the name of the train is backwards. The director must have wanted to save money, and reversed the film for a mirror image.
Character mistake: Phoebe gets hit in the head with a tree branch but she puts her hand on the opposite side she was hit on.
Factual error: Group Captain Massey is referred to several times, even by British officers, as "Captain" Massey. Group captains are always called group captains.