Revealing mistake: After the sniper is shot he falls through the wall. Look at his silencer when he hits the ground - it bends where it attaches to the muzzle. A real metal silencer wouldn't do that. (00:41:25)
Revealing mistake: In the end when Mulder is reading the paper in the park. The paper is clearly a prop. Only the frontpage is real - when he puts the paper away you can see that the rest of the paper consists of blank pages. (01:45:45)
Revealing mistake: When they are all in the camper van Tiffany gives Chucky a biscuit then walks away from him, from the way she gave him the plate, they would have all fallen off. (01:07:35)
Revealing mistake: When Lola screams and the glass clock smashes, you can see the small pellet that makes it shatter, go through the glass and then bounce off the wall. (00:20:40)
Revealing mistake: In the beginning scene on the Bak'u planet the stone bridge bends under the weight of the child. (00:04:15)
Revealing mistake: During the big gun battle right before the last fight scene, Riggs is shown driving a forklift, and knocking over some barrels on top of Wah Sing Ku, leader of the Triads. When the forklift does the 180° turn, you can see that it is not Mel Gibson, but an Asian stunt man.
Revealing mistake: Near the end of the film, after the shootout, there's a shot with the camera zooming in on a newspaper at Will Smith's front door. If you pause it right once the headline fills the top of the screen, you'll notice all the paragraphs are just repeated, word for word. Additionally the word "received" is misspelled.
Revealing mistake: In the New York meteor shower scene, most of the cars blow up without having been hit at all.
Revealing mistake: When Montoya uses a spear to toss the vampire woman from the prison door into the sunlit street, it is an obvious dummy that has been used. First you see the woman stumble out, and the first flames shoot out of her, then the angle changes to a close-up of her as she is engulfed in fire. In the close-up, she has become bigger and rounder, and does not move.
Revealing mistake: During the attack of the Global Sedition on the space station at the beginning of the film, several objects can be seen with dark grey boxes around them - CGI artifacts. One clear time is when Ranger 1 is saying "Damn, can't shake him". (00:02:35)
Revealing mistake: When Charlie turns and sees Michael after futzing with the garbage disposal, it's obvious that Michael's mask is a (rather poor) CGI creation. It looks very cartoonish and unlike the way it looks in the rest of the film. The scene was shot early in production with an original mask that eventually was tossed out for the final design when producers thought it didn't quite look right. Because Michael was in a medium-closeup shot and they didn't have time to reshoot the scene, they opted to (somewhat obviously) digitally replace the mask.
Revealing mistake: When Karen and Whistler start to fire at Frost's men, after they discovered Blade's hideout, Whistler shoots a black guy who has a large bump under his shirt, quite obviously the squib. (01:11:00)
Revealing mistake: During the scene where the two teenage stars are outrunning the tidal wave through the hills, the girl is supposedly carrying her baby sibling strapped to her chest. However, the legs that can be seen dangling out of the baby-carrier belong to a dummy.
Revealing mistake: When they are climbing up from the subway tunnel into Madison Square Garden, there are lots of half-dead fish scattered around from when Godzilla was feeding. Right before they enter the arena, in the overhead shot looking down on the actors, there is a wiggling fish in the lower left portion of the screen. If you look closely, you can see a string attached to the fish. A crew member is obviously tugging on it from below, to make the fish move.
Revealing mistake: At the beginning, the dead policeman can be seen rolling himself with his arms. (00:06:45)
Revealing mistake: At the start of the chase, the Mercedes slides around a bit, and it is comically obvious that the tire smoke has been poorly painted onto the scene. (00:45:15)
Revealing mistake: After Hank shoots Lou's wife in the kitchen, the camera shows Jacob walking into the house, then Lou's body on the floor with a puddle of blood around his head. If you watch closely, you can see Lou's left eye twitch.
Revealing mistake: Near the end (DVD), when Sadako comes out of the TV, you can see where her finger extensions have been placed (you can see the join between her real finger and the fake one). (01:22:50)
Suggested correction: She's not wearing finger extensions. There are small prosthetics to make it look like her fingernails are missing, but her fingers are normal length.
Revealing mistake: In the scene where Murdoch falls off the building, you can see the rope that is holding him up, twice. (00:59:00)
Revealing mistake: When Natalie is in the old building and she is looking around, she opens the door and Parker's dead body falls out onto the floor. When it cuts to a close up of his body, you can clearly see the side of his neck pulsating although he is dead. (01:19:50)