Revealing mistake: While the German officer, played by Hardy Krüger, is in a pill box reporting back to his headquarters, with the bridge seen in the background, rush-hour traffic can been seen on the bridge.
Revealing mistake: When the UN team arrives in the Gobi desert, there's one shot where the helicopters and trucks are parked. They're supposed to be moving, but you can tell from the way the flags are moving that the wind is only coming from the helicopters.
Revealing mistake: Just after the helicopters crash during the chase with the crop duster keep a close eye and one of the helos is still in the shots flying.
Revealing mistake: In one scene, focused only on an actress's hand holding a lit cigarette, it dawns on you that the smoke is curling back downwards and the cigarette is miraculously getting longer. This is a flipped shot, it is seen backwards.
Revealing mistake: During the first rollercoaster accident, the bodies in the cars are obviously dummies. (00:13:35)
Revealing mistake: In the beginning of the movie when Orca is about to hit the great white shark out of the water the stick that holds the "head" of the great white is visible as it swims by.
Revealing mistake: In the beginning when Shockley pulls up and the Jack Daniels falls out you see it hit a wet mark from the previous take.
Revealing mistake: During the demonstration of the Iron Claw technique in the opening credits, the master grips two bamboos; as he does it, you can see they are already cut before he applies the technique that supposedly splits them. (00:03:55)
Revealing mistake: While the plane is almost upside down, papers and stuff fall inside, but one can notice that it's the actors throwing the papers, not gravity making them fall.