Revealing mistake: Throughout the entire film, whenever a character performs a high flying martial arts move, you can see that they are holding on to their wires.
Revealing mistake: The algae in the "garden" is fake. It is cloth.
Revealing mistake: When Nick has swam back to his water scooter, he climbs up and drives away and the shark comes up behind him. But look carefully behind Nick as he is climbing. The nose of the shark is visible during the whole scene, right under the surface. This proves that the shark was a dummy, waiting to come up.
Revealing mistake: In the first morgue scene the body on the table is obviously breathing.
Revealing mistake: When the shark is on the deck of the Andrea Gail, you can see the equipment underneath it that is making it move. (00:47:30)
Revealing mistake: In the fight scene between Riddick and Johns, there is a wide shot of them both fighting over Johns' shotgun. In this shot it is apparent that it is not Vin Diesel in the shot but in fact a stunt double. (01:17:35)
Revealing mistake: In an early shot shown from the neighbor's house, it is established that the Spencers' house is quite a ways uphill. Some of the later shots where Claire is spying on her neighbors and looking at their home, the angle of view does not appear to be correct. The neighbors' house looks like it's a lot closer and more level with the Spencers' home.
Revealing mistake: In the end, when Paula kills Hein, you can see in close-ups that the scars on his face are on tape and not on his skin.
Revealing mistake: When Alex drops the cigarette lighter to ignite the gas, you can see the flame is started from a different source, as it starts on the other side of the screen, a fair distance away from where the lighter landed.
Revealing mistake: Towards the end of the film, when Parker and Longbaugh are coming to get Robin, they get in a small (by comparison to the end of the film) gunfight with Jeffers and the unnamed pimp. During the gunfight, Longbaugh empties two magazines through his 7.62 Galil trying to get Jeffers through the wall. However, the guy setting up the squibs must have been short of creativity, because the resulting yardstick straight line of holes would be virtually impossible to make with a 7.62 on full auto.
Revealing mistake: At the 'beginning' when Teddy and Leonard drive up to the abandoned building with the old truck out front, inside the truck Leonard handles a number of .357 revolver calibre bullets that have apparently not been fired, but you can clearly see the indented primers in the base of the bullets, indicating that they are just inert movie props. (00:04:40)
Revealing mistake: The 7 Children on the road that Kim swerves to avoid and dents the car are obviously wearing facepaint - and it's been applied very badly at that.
Revealing mistake: When Jessica's dead body is seen by Annie in her bath and then in the hall, the make-up that is keeping Jessica's eye shut is coming away around the edges.
Revealing mistake: Sebastian Caine wears a latex mask and latex gloves in order to appear near-human. The mask he wears is fairly long, and covers his neck, and the tops of his shoulders and collarbone. However, there is a scene in which Linda and Matt are helping a nauseous Sebastian reach the toilet, where he vomits (invisible fluid) into it. In this scene, when Sebastian breaks free from them and runs to the toilet, we can see that his arms and chest are also visible, skin-colored. The mask he wears only reaches the very base of his neck, so it is possible that the actor playing the invisible man did not realize that the tops of his arms and chest were visible. (00:49:20)
Revealing mistake: When Ed falls on his belly and dies of a heart-attack at the end of the film, if you look closely, you can see the actor is still breathing a few times. He's trying to hold his breath, but every so often, you can see his back subtly raise and lower as he slowly takes a breath in and out.
Revealing mistake: When Patrick opens his fridge to offer Jean some sorbet, you can see the decapitated head of a woman in the fridge. If you pay close attention, you can see the head is moving a little. (00:59:36)
Suggested correction: It's a prop head resting on a freezer shelf. It could simply be that opening the freezer door causes the head to sway a little, similar to if you had an egg, lemon, or something else that didn't have a flat bottom resting on a shelf inside a fridge.
No, the way it was filmed was with the actual actress putting her head up through a hole in shelf. It's her head moving.