Revealing mistake: When Han shoots at Bruce Willis and the others with the Gatling gun, we see cartridges on the ground. You can tell that they are all blanks. The tip is jagged and has been closed - live ammo just has an open hole where the bullet was.
Revealing mistake: When Nica crawls to the elevator to escape Chucky, she bends her legs in order to shut the elevator door. She is meant to be a paraplegic and have no feeling in her legs.
Revealing mistake: Towards the end, Jake Gyllenhaal is browsing the internet on a computer running Windows 7...despite the "no network" notification icon at the bottom right of the taskbar. (01:25:05)
Revealing mistake: When the family's car is about to be hit by the ambulance as they try to escape downtown, Gerry is driving and his wife is up, leaning over the passenger seat talking to their daughter. The camera angle changes to a view from behind, and as the ambulance is about to hit, we can see there is nobody in the car and the ambulance driver is wearing a safety helmet. This is viewable in just a few frames. (00:08:00)
Revealing mistake: At the end of the film when John Moon is digging a shallow grave for the dead girl (who has been dead for days, and spent additional days in a freezer also). You can see the dead girl breathing by the way her arm is moving on her chest. (01:46:00 - 01:47:00)
Revealing mistake: The truck Roman and Tej are suspended in during the runway scene has no prop shaft attached (without it, the truck won't be able to drive at all). When you look at the bottom of the truck while it's in the air, you can see where the shaft was supposed to be attached to the rear differential.
Revealing mistake: When Tony and Rhodes are on the oil tanker bunkered behind an obstacle, Tony realises his gun is empty and asks Rhodes for a new magazine. When Tony ejects the magazine you can see that it is actually an airsoft gun magazine; thus exposing that it is actually a prop gun.
Revealing mistake: In the opening chase with the armoured truck it comes up behind a blue car that is already dented on the near side, which is the side it slides round to so the truck hits it. It then gets pushed onto a silver van that is completely wrecked from previous takes.
Revealing mistake: When Mother Russia blows up the police car with the gas bottle, both policeman are thrown clear with no damage at all, showing that they came from behind the car and not from inside it.
Revealing mistake: When driving through the corn fields, it's obvious from the ZR1 wing mirror that the car isn't actually moving. (01:21:35)
Revealing mistake: In the scene where Josh Duhamel and Julianne Hough are in the row boat, it starts to rain so they rush to shore. They huddle under a tree and you can see behind them that the rain is only falling right around them - only slightly further away on the lake there are no rain drops hitting the water.
Revealing mistake: When Jack says "Screw you" to Sergeant Sykes, Sykes pulls his pistol and shoots Jack. You see the gun flash, and you see an impact on Jack. But if you watch closely, they do not line up. The special effects charge goes off indicating the hit on Jack's right breast. But when the gun goes off, while still moving, at that moment it was pointing at Jack's lower left abdominal region. (00:58:50)
Revealing mistake: When Kershaw is driving the car from the passenger seat, as the car crashes through the roadside stands, you can plainly see a stunt driver driving the car.
Revealing mistake: After the banker has picked out his card, Daniel says "Show it your friends in Section B. But not to us." As he says this, visible in the background is a television with a live feed from the stage. On the television, we can see Henley walking around the stage, but the movements of Henley on the TV don't match up with what Henley is doing onstage - on the live TV feed, she is shown looking up at the audience, but on the stage at the same moment she is looking at the banker. Also, Jack walks right by her and he is never shown on the TV. (00:19:25)
Revealing mistake: Before Derek punches the side of the wall, you can see the weakened area of the wall before impact. Look at the color difference.
Revealing mistake: Pablo and his buddy are driving through the middle of nowhere, and end up in the bucolic town of Red Stone. The first two people they drive by are armed with machetes. The close-up of the second one is reversed, as shown by the dilapidated street sign - it can't be deliberately shown by say, the car mirror, because they are looking at him turning their head. (00:05:40)
Revealing mistake: After Paul shoots the monkey he picks it up to put it in a box and the "dead monkey" is fake. (00:51:56)
Revealing mistake: During the big shoot-out at the end, the close-up of the brown Ford pickup is flipped side to side. Check out the F150 logo on the fender, which appears as a mirror image.
Revealing mistake: When John attacks the 3 bad guys in the residence area, one of them throws John into the wall which wobbles. (01:00:35)
Revealing mistake: In the scene where Jake is about to enter the boat, he is hiding in a trailer so he can sneak up on one of Pope's men. When he jumps up, grabs the pole and stabs him in the chest with it, you can see it doesn't go through his chest, but instead it just goes in between his arm and his rib cage. You have to look closely to see.