Revealing mistake: When The Mask is dancing with Tina and he turns her into a human tornado while spinning her around, none of the onlookers in the crowd show the slightest bit of amazement at the impossible feat that just occurred in front of them, indicating that the extras were not directed to react to the special effects.
Revealing mistake: When Jules and Vincent are riding in the car during the "Royale with Cheese" conversation, it is possible to see the reflection of their car in the background, being towed on a trailer. (00:07:05 - 00:08:00)
Revealing mistake: When Wilma pulls the suitcase forward during the party scene, her fingers squeeze it, making deep indentations in it. (00:34:30)
Revealing mistake: When Draven sends T-bird to his death in his car, the real Ford Thunderbird is replaced by a fake mockup using a flimsy one-piece fiberglass body mounted on a pair of straight axles. When it explodes, the body lifts off in one piece, warping wildly while the front axle simply falls away. No proper car components like engine, transmission, suspension and so on, are seen anywhere, though they should be. (00:57:05)
Revealing mistake: The BMW crashes through a metal gate at the border but does not suffer as much as a scratch.
Revealing mistake: In the big wheel, the boy falls out and grabs Axel's leg. When it zooms out, it is a man climbing his leg.
Revealing mistake: At the beginning, when they have just robbed the bank, the fat guy slides down that shoot on the outside of the building as the get-a-way car pulls up to meet him. If you look closely at the road before the car stops, you can see skid marks left by the car in previous takes.
Revealing mistake: When Shame calls the department store from the payphone, he makes the call without putting money in it. He just picks up the phone and dials.
Revealing mistake: In the scene where Warden Norton is loading his pistol, as he dumps out the bullets and loads them the primers are dimpled. Unfired bullets would not have the dimples from the gun's hammer (even if they were home made reloads, the primer would have been replaced).
Revealing mistake: After the SWAT team grab Mathilda, the guy who grabbed her backs up against the wall and it bends inward, revealing it to be a set.
Revealing mistake: When Blankman is using his homemade grappling hook, you can see that the string is attached to the top of the invention and turning the handle isn't doing anything as he's simply being lowered.