Factual error: When Calvin and Co. are tying up Bittleman so they can get Calvin's shoes back, it shows highlights from the game that's being played at that very moment between Toronto and the Knights. It shows some highlights from Vince Carter, but one of these highlights was not from the game at all. It's his windmill dunk from the actual NBA 2003 dunk comp. There are no other players on the court, only camera crew. (01:14:15)
Factual error: It's very nice that the Kate and Jonas clones came out looking exactly like the originals, but the DNA doesn't contain information about the hair length and exact haircut (and mustache, in Jonas' case) at the time of the replication. They would never come out exactly the same.
Factual error: During the Weapon show Eddie Murphy is shot at by the bad guy with a big gun. He hides behind a pile of sand bags. At the end of the movie the same guy shoots into the ceiling, with the same gun, and we can see that the bullets go through the ceiling making huge holes. How is it possible that the bullets go through a ceiling made of concrete, but not through a row of sand bags?
Factual error: When Santa is shown the miniscule print on the 'Santa Clause' card (that he is supposed to be/get married) the Elf holds an enormous lens in front of it, to make it easier for Santa to read the print. From the distance Santa is standing at, from his point of view the card should appear upside down.
Factual error: When Tom Green says he is going to beat the bejesus out of the guy on the phone and slams the phone down several times you can hear a bell ring inside the phone; that type of phone doesn't use a bell when it rings.
Factual error: After the VW van hits the tree stump, steam is coming from the front of the vehicle. Those vehicles have the engine in the rear. (00:05:53)
Factual error: In the big football scene we see the very short student playing the tuba. The music he is playing requires the use of the valves on the tuba, but his fingers never move. (01:07:55)
Factual error: When Johnny Hallyday goes into the bakery to buy bread, the price in the subtitle is translated as 3 francs, rather than 3 euros. At the old exchange rate, 3 francs were the equivalent of about 50 US cents -- not nearly enough for a baguette.
Factual error: Throughout the film the two men wear modern rubber soled Army boots, not leather soled as they would have been at the time - particularly noticeable when they are trying to sleep in the woods, and also when they cut the telephone wires.
Factual error: The screeching call occasionally made by the Falcon is actually the sound of a Red-tailed hawk. Falcons do not make this sound.
Factual error: During the fight scene on the moon outside Pluto Nash's hideout, dust can be seen floating around when kicked up. In the absence of an atmosphere and in low gravity, dust wouldn't form in clouds, but would just fly up and fall like water.
Factual error: When Jay and Tee are in the diner at the start of the film, it's 9pm (we know this because Tee started at noon and Jay set the neuralyzer to nine hours), and outside it's completely dark. In New York City at 9pm in July, the sky is not completely dark - the sun would just be setting. (00:13:20)
Factual error: In different scenes, with the mama Megalodon, the teeth shown are around the size of the people themselves. In actuality, the Megalodon's tooth is only a bit larger than the size of your hand.
Factual error: At the end of the movie, when Burke faces Sheldon, he tells him "one of the secrets about owning a gun: You have to cock it." But since Sheldon's weapon was a double-action revolver he doesn't have to cock it. He could just pull the trigger.
Factual error: The registration letters on the cars are too new for 1969.
Factual error: Juni is sending the bad twins to Gobi desert. After few scenes, we can see the bad twins in the middle of Gobi desert. They get there with a submarine. How can they enter to a middle of the desert with a submarine inside the water?
Factual error: In the bathroom scene at the motel where Lucy is in the shower and Mimi is using the toilet, Mimi flushes the toilet and Lucy yells "Ahh, freakin' cold," however, if someone flushes a toilet whilst another person is in the shower then this would result in the cold water being removed from the shower, so Lucy really should have yelled "freakin' hot," unless the toilet water was hot water. (00:23:35)
Factual error: The way the statue is handled in the movie is unrealistic. They say in the movie that the statue is thousands of years old and has to be kept at 60 degrees to stop the decomposition from getting worse. If it was as old as they say it is, the way the handle it, without gloves or any special protection, it would crumble in their hands. You can't handle a 3000 or more year old statue that small and expect it not to break.
Factual error: During the fight just before Elvis uses the alcohol, Bubba Ho-tep exclaims a series of Egyptian hieroglyphs which are translated as "By the unwinking eye of Ra." The symbol on the far right is not the Eye of Ra (which faces right) but the Eye of Thoth (an identical symbol which faces left). (01:18:10)
Factual error: During the wedding scene, the Bride's Family is on the right side facing the alter, in reality, the Bride's Family sits on the left side, the same side the bride stands on. (00:58:20)