Factual error: The vents that Hunt and his sidekick crawl down at CIA Headquarters are standard galvanized steel box vents; they are very common in the building trade. Try walking or crawling down one - you'll make a noise like the sky is falling down. People will be able to hear you for miles. Every person in that building would know somebody crawling about in the vent system. (This error applies to dozens of films, not only this one).
Visible crew/equipment: When Melissa dodges the truck that has fallen from sky and Dusty rushes to open a door and help Melissa get out of the truck, the reflection of a camera is seen in the bottom right corner of the truck window. As they move out and pan to the right, you can see a reflection of the same camera and cameraman at the bottom right corner of the truck door as they move away. (00:33:50)
Visible crew/equipment: At the end when Sidney's dad falls out of the closet, if you look closely you can see the hands of a crewmember who was in there too, pushing items out after him. (01:42:40)
Continuity mistake: Throughout the entire film the tattoo on George Clooney's neck moves position and changes shape.
Visible crew/equipment: When Dr. Okun is about to unlock "the vault", and says, "The freak show," a crewmember wearing a black and white striped shirt is hiding under the vault's floor, right behind Okun. (Only visible on fullscreen DVD.)
Continuity mistake: Arnold goes to the gay bar to solicit the help of the guy he saved at the beginning of the movie. The guy is wearing a white shirt and a vest black/gold lamay. During their conversation he takes off the vest, then it cuts to another bartender. When it cuts back the guy has the vest on, another shot and the vest is off again. (00:08:05 - 01:10:50)
Other mistake: When Christian Slater shoots 9 or 10 shots out of a 6-shooter, there is no possible way that he could have had time to reload in the time allotted.
Continuity mistake: When Sonic and Tails are fighting metal Robotnik, he shoots glue at Tail's tail. Tails says he can't fly to help Sonic, but when he gets the piece of concrete to surf across the water on you can see that his tails are not glued together.
Continuity mistake: Nick Cage is chasing Mason in the yellow Ferrari. The windshield breaks at least twice, but is perfect in the next shot. (00:45:55)
Factual error: A flight manifest would never state on its seating chart that an armed U.S. marshal was on board as it gives away that person's identity and puts everyone on board in danger.
Visible crew/equipment: Brandi drives over to Darnell's place and throws a brick through his windshield. When the two of them are arguing and Brandi pulls off, you can see a reflection of a crew member holding a camera.
Continuity mistake: In the scene where Picard, Worf and Hawk are outside the ship and want to separate the transmitter dish from the hull, Picard must move a kind of tube out of an console and must turn it from a low to a high position. In one shot the tube is in the high position, in the next shot it is in the low position and then Picard pulls it out and turns it in the high position. (01:06:40 - 01:10:35)
Continuity mistake: When Jennifer Tilly is in bed wearing some kind of skimpy pink thing, only one strap is always on her shoulder, but between shots it changes from left, to the right, back to the left, repeatedly. Every two or three shots.
Visible crew/equipment: Marge receives the call after the execution (the first call), waking her up. The camera tracks toward the bed, and its shadow is visible on the right side of the screen.
Visible crew/equipment: After Keanu finds Dr. Alistair Barkley dead on the lab floor and goes to attempt to revive him several shots show nobody else is around him, but straight after he starts to push on his chest a crew member can be seen stood over his right shoulder in a red top with a blue sleeve.
Deliberate mistake: In the towel-dance scene after Demi has put on her white panties and spins off the towel from her hair she starts to rip off her body towel. Then in the next frame the towel is again tucked in. Apparently they didn't want Demi topless when she leaned over to slip on her blue shorts.
Continuity mistake: After he met the woman who helps them, Stephen Baldwin is wearing a shirt over his shoulders. In the very next cut, it is missing, but it reappears in the next cut.
Continuity mistake: At one point Snipes jumps into the ocean to save his son, and when it shows a close-up on his face, you can tell it's not him. It's a pretty weak stunt double.
Factual error: The actual Tsavo lions responsible for the killings had no manes - see for yourself; they are on display at the Field Museum in Chicago. [The filmmakers employed artistic license in using maned lions. They were also certain to include - at the very end of the movie - footage of the real Tsavo man eaters, as they appear in the Field Museum.]
Visible crew/equipment: In the early scene, when Mel Gibson is talking to his son, a boom mic can be seen at the top of the screen. (Boom mics drop in several times throughout the film.)