Factual error: During the 4x4 chase across the island, the Land Rover used is a modern variant, not in production in 1963.
Continuity mistake: When Maya is trapped in the bathroom and the bad guy breaks in, she drops her pepper spray which you can see lying on the floor when the bad guy is talking on the phone. Shortly afterwards it's gone. (00:47:35)
Factual error: Herman Melville interviews whaling survivor Thomas Nickerson in Feb. 1850. Nickerson tells him "I heard a man from Pennsylvania drilled a hole in the ground recently and found oil." Oil was discovered in Titusville PA in 1859.
Revealing mistake: Right at the beginning of the film "rain" is falling on the car the camera shows before it moves to focus into the tunnel. However, look at the cars behind it, they aren't wet at all and it's visibly sunny. It's water being poured onto the car directly in front of the camera.
Continuity mistake: After his fight with Bodhi, Utah gets one wound on his left cheekbone and one on his nose, both are gone when Johnnie is talking with his boss at the FBI office.
Continuity mistake: When Tris saves Christina from falling and then rolls on to her back you can see her sports bra underneath. In the next scene, she and Tobias have a brief sex scene where she removes the same top, but there is no bra underneath.
Continuity mistake: When he fights Chuck Lidell, he is wounded on the right side of his body. During a scene when he is lying on his side, the wound has moved to his left side and then magically reappears back on his right when he stands up.
Continuity mistake: When Jesse Eisenberg seeks shelter at John Leguizamo's house, John Leguizamo pulls a gun on him. Jesse Eisenberg grabs the gun from John Leguizamo and in the close up of this action it's a completely different gun. (00:40:55)
Factual error: When he is in the restaurant and looking at the security feed, he does a who command when it should be "whois". Also the IP is incorrect - the 3rd octet is 265, despite the maximum possible value being 255.
Factual error: Near the end, Jackie Chan's vastly-outnumbered forces resort to throwing stones to somehow utterly destroy a phalanx of Roman legionnaires in close-quarter combat. This scene flies in the face of what we know about Roman military superiority in the time of Tiberius. The Roman Army was the best-trained, best-organized, best-equipped military force of the Ancient World, specializing in tireless close-quarter combat and impenetrable defense. To suggest that Jackie Chan's frantic and disorganized group of fighters (throwing stones by hand) might overcome Roman legionnaires is like suggesting that cave men might overcome the modern U.S. Marine Corps.
Character mistake: The poster on the wall near the start reads "Our Egg Donor's [sic.] are helping to fulfill the dreams of women across America." There is an unnecessary apostrophe in the word "Donor's." (00:10:05)
Continuity mistake: At the end, the TV newscaster reports that 150,000 reserve human forces have been activated. But the crawl strip at the bottom of the screen reads "150,000 RESERVED human forces," a different meaning altogether. (01:59:00)
Continuity mistake: As Sean Penn arrives in the bar at the beginning of the movie, Annie is engaged in conversation with another man, saying "We have to meet the new Minister of Health." You can spot her in the group shot and she has her elbow on the table and leaning her head against the hand. In the close-up her position is completely different. (00:03:00)
Continuity mistake: After the opening scene in the Middle East, the scene cuts to an overview shot of London fading towards the U.S. Embassy. As the scene starts, the time on Big Ben is 3:05, but when the camera reaches the U.S. Embassy, the time read on the description at the bottom reads 8:15.
Factual error: In the fighting scene in U-Bahnhof Alexanderplatz the underground trains move much faster than in real world. Alexanderplatz is a railhead station. The trains would either crash into a wall or would not have enough room to accelerate that fast.
Factual error: At the beginning of the movie when Danny Glover is sitting at the chessboard, the pieces are lined up wrong on both sides of the board. If Danny has the white pieces, the king should be on his right. The black king should be on the opponent's left.
Continuity mistake: During the fight in the garage, the protagonist neutralizes (and maybe neuters) one of the baddies crotching him with the car door. In that sequence, his hands keep changing position on the door. (00:07:30)
Character mistake: In his opening prologue, Burt says the Graboids have been contained to the Northern Hemisphere, showing a map highlighting the Graboid attacks of the first film in Nevada and the second film in Mexico. However, it overlooks the Graboid/Shrieker attack in Argentina, in the Southern hemisphere, shown at the beginning of Tremors 3, an incursion Burt personally put down. It's not like it was classified - characters in that movie talk about it being reported by CNN, and characters in the Tremors TV series talk about it as well. And it's not like Tremors 3 is no longer canon, since Burt makes two references to being swallowed by the Graboid in that movie (which also becomes a plot point in Tremors 6).
Visible crew/equipment: When Matthew is following Nina's cries for help through the woods you can see numerous set lights in between the trees (in the distance). (01:09:43)