Revealing mistake: It's an obvious rubber dummy when Chavez cuts off Juarez's leg. (00:43:30 - 00:44:05)
Revealing mistake: The film is set in 1891. After Holmes escapes from Parliament, Thomas Thornycroft's statue of Boadicea on the Thames Embankment next to Westminster Bridge can be seen, even though it was not completed until 1905. (01:35:45)
Revealing mistake: When Langdon and Victoria walk towards the Pantheon, the first two angles show them walking alone with some stunt-women behind. But in the third angle, a couple of seconds later, a huge line of people appears, lining perfectly in the back, watching the camera. Obviously a group of real tourists standing behind a security line watching the shooting.
Revealing mistake: When William is running at the end, there is already a blood trail on the floor. Clearly from another take. (01:15:10)
Revealing mistake: After a shootout with Baby Face Nelson at a hotel, Melvin Purvis converses with J. Edgar Hoover over the telephone. As he says, "Our type cannot get the job done." Watch the background. You can see a modern era train move along the tracks in the darkness. This is inconsistent with the film's setting of 1933/1934.
Revealing mistake: When Vang and Chev are running and about to jump the fence into the power station, look in the fence and you can see the handy foot holds that the actors use to go over the fence.
Revealing mistake: When the guys are on the bench and the kid is taking a photo of them with the cell phone, when the scene cuts back to behind the kid before the phone is kicked, the phone is just on the standard main screen. The camera is not even on.
Revealing mistake: Just after the Buick spins around to knock the trailer loose, we see the Buick speeding away backwards alongside the truck. If you look carefully you can see the REAR tires are steering, not the fronts. This car was modified with the body mounted backwards on the chassis because the transmission only has one reverse gear, so to get the speed and handling needed, the car had to be going 'forward' with a 'backward' body. (00:05:30)
Revealing mistake: When Cora and Madea are driving the mini-van to go to anger management you can see that the gear shift lever is in the up or "park" position. The lever should be in the "drive" position.
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: 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 the soldier is tempering, you can see sparks fly before the hammer hits the metal.