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 Ace and Melissa are in bed together having sex if you look close enough you can see that she is wearing underwear. (00:45:35)
Revealing mistake: If you look at the missing part of the bridge, and look at the shadow underneath, the shadow is of a full bridge. (01:02:35)
Revealing mistake: In the final game against Iceland scene, there is a point where you can see that the people in the stands are actually cardboard cut-outs.
Revealing mistake: When running towards the "bear attack", Sean activates the Guyver. Close ups of the armor attaching itself to his body show that's not really Sean as his arm and leg are both seen not moving even though he's running to where the attack is occurring.
Revealing mistake: During the scene where Arnold's character is escaping from the mansion at the beginning of the movie, there is a part where he is running down a snowy hill through trees. At one point during the hill scene, Arnold does a flip head first. When he lands the flip, you can clearly see the stunt double's face as he turns to shoot at more bad guys. (00:13:30)
Revealing mistake: In the fight between Julie and Ned, when she does the last kick to take him down, it's obvious that she doesn't actually kick him.
Revealing mistake: When Picard is trying to squeeze through the rock archway, he looks like he's stuck, but a closer look reveals he has enough room above his back to squeeze through without any trouble.
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 Jack Ryan goes to Ernesto Escabeda's residence and asks to see Ernesto, as he is led up to the house we see his two companions on a roof top ledge watching through binoculars and one of them says "He's in", if you look at that shot closely the suppressor on the mp5 laying next to the sniper is fitted at a decidedly wonky looking angle.
Revealing mistake: When the team are heading back to base and we see the skyline for the first time, it's obviously a painting projected onto a blue screen. You can see the line where the set and the screen meet. There is also a white line running across the bottom of the screen. (00:24:50)
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 scene where the dead guy falls out of the closet and he and Julia fall to the floor, the dead guy moves (especially his legs) when Julia gets up.
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: When Gail throws a stone to make it bounce on the water you see in slow motion that she fakes the throw with an empty hand, and only in the next shot do you actually see the stone bouncing. (00:27:25)
Revealing mistake: While Noro, a member of a shoeless society, is doing his uphill training you get a glimpse of his shoes, in spite of all efforts to hide his feet in the grass. (00:53:30)
Revealing mistake: Near the end of the film, when the Cadillac Allante is falling, watch closely and you will see it explode just before it hits the ground.
Revealing mistake: When Ray Liotta's character fights the "lifeguard", the blade on the end of his spear is obviously made of rubber.
Revealing mistake: The dead girl in the holding cell can be seen breathing.