Revealing mistake: When Larry floats drowned in the pool, his face remains motionless until the very last second, when he starts to chuckle: probably a flaw of the actor straining for the last bit of air.
Revealing mistake: When they drive out of Vegas, headed for Witch Mountain, there is a shot that appears to be made with a camera on a mobile cherry picker. The camera sweeps across the road and up high, watching as the vehicle passes under the camera. As it passes the camera, you can see a trail of dust that was kicked up by the cherry picker. It crosses the road and is still floating in the air from a recent crossing.
Revealing mistake: When the charity workers are unloading the food in Styrofoam packages at LAMP, the light shining through the packages reveals that they are empty.
Revealing mistake: When Flint screws the fuse into the fuse box to get the lights back on his dad just appears out of thin air.
Revealing mistake: During the fight scene at the rest area, Gina is hitting Dick, and her sweater rides up her back, revealing the battery pack for the microphone taped to the small of her back.
Revealing mistake: In the scene where Marshall "Lube" Lubetsky has just fallen out of the cable car on the mountain and Ashley climbs down to get to him we see foot prints in the snow coming from the trees on the side to where Marshall is lying, giving away that the actor walked to that position, when the character is meant to have fallen there.
Revealing mistake: When Connor jumps out of his uncle's car before it crashes into the lake, it's obviously a stuntman. His hair is darker and straighter than the actor's. (01:22:40)
Revealing mistake: When the girl is giving the guy a blow job in the school restroom, he finishes in her mouth. She goes to the sink and spits it out. You can obviously tell she had a mouthful of water going by the color and quantity. (00:20:45)
Revealing mistake: In the scene at the Pope's apartment, when Clouseau enters the balcony for the second time to "look at the moon", there is a third shot from his back when he is leaning out of the balcony. You can see a platform which supposedly was there to help him easily fall out. (00:54:35)
Revealing mistake: Raju's website is actually a screenshot. The recycle bin is visible in the upper left corner. It can also be seen that there is no internet connection in the lower right corner of the computer. (02:40:15)
Revealing mistake: While breaking into the vault Gabe and Ripley use two ratchets to pull the large block that they cut out of the wall. The block moves as they pull the ratchet arm back. The block however moves only at the end of the pull for the second pull which makes no sense. This was an obvious timing error from whatever was really doing the pulling. The ratchet itself would've only pulled the block an inch at best. Additionally, when the block is almost out it shifts unnaturally showing that it was not made out of concrete. (00:56:45)
Revealing mistake: When both Lisbeth and Mikael open their Apple Mac computers and use them, the little apples on the outside should light up, but they don't - neither computer does; they're switched off or not powered up - Mikael even goes to the trouble of connecting his to a power cord.
Revealing mistake: When the group is leaving the dinner they are talking while standing outside in the snow. It is supposed to be in COLD Wisconsin, yet you cannot see anyone's breath as you would when someone is talking outside in the cold. (01:15:50)
Revealing mistake: When Steven Seagal makes his triumphant entrance in the credits, his sword misses the first zombie he supposedly hacks (right after "Written by"), by a mile. (00:03:20)
Revealing mistake: When the Sheriff is in pursuit of the black SUV, there is a particular shot of the Sheriff's car doing a wide right turn and you can see that it's a young bald stunt driver, completely unlike the older, full head of hair Bruce Boxleitner.
Revealing mistake: In the scenes where Sam 1 and Sam 2 are in touch, the double is completely wrong. Wrong hair, wrong profile and wrong hind end.