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 Tim Allen startles Santa Clause and he falls off of the roof, Santa's foot kicks up a blanket that was used to look like some snow on the roof. (00:14:10)
Revealing mistake: When the camera pans across Kareem Abdul Jabar's dead body sprawled out on the steps, the corpse blinks.
Revealing mistake: In the scene where O'Neil is fighting Ra's bodyguard, the bodyguard uses claws and hits O'Neil's back, tearing his shirt and wounding him. But you can see Kurt's "wounds" and torn shirt right before he's hit by the bodyguard (a scene after Ra's bodyguard's claws are shown). (01:49:10)
Revealing mistake: When Lestat returns from the swamp and attacks Louis and Claudia, he advances towards Claudia around the piano and his shirt flies up, showing normal flesh color on his back, only his face and hands are covered in makeup.
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: When we see shots of the Leprechaun inside the safe, there is much more room than when he exits.
Revealing mistake: When the glove comes up the car seat and into Porter's chest, there are lights from buildings out the side window, so the car isn't moving at all. When it cuts, there's suddenly a hill where the lights should be and now the car is moving again. (00:29:30)
Revealing mistake: As Moe and Cranston chase Khan through the city streets, the view through the rear window of Moe's cab shows the cab doing a sharp turn even though it is driving straight.
Revealing mistake: When Willie's body is covered, you can see the little boy playing him scrunch his eyes tighter shut and he smiles very briefly.
Revealing mistake: When Alex throws Banes at the lab, you can see the stunt double falling for him.