Revealing mistake: Jimmy's [Matthew Lawrence] glass of cola on the table is filled to a level slightly above the groove (mortar joint) in the cement block wall. The next front view shows the top of Jimmy's glass slightly above the same groove and the level of cola is about 2" below the groove. A little later, the level of cola in the glass is like it was earlier - slightly above the groove. A cement block wall is stationary and nobody raised or lowered the table; use of a green screen can explain the anomaly. (00:08:05 - 00:08:41)
Revealing mistake: During the battle of the Chosin Reservoir, just before VF-32 comes in to provide air support, the Marines are firing their M1 Rifles. One of them mimics the recoil of it but we don't see the bolt move back when he fires his rifle. The M1 Rifle or Garand is semiautomatic, and the bolt moves back each time the shooter pulls the trigger.
Revealing mistake: While with Abigail, doors open to reveal a city and a plane behind which rises big jets of air that move Loretta's hair. However, the decorations on the table don't move a single inch (until several shots later), giving away that the city behind is CGI.
Revealing mistake: When Chris Evans is dragging the girl into the maze at the end you can see the burn mark on his shoulder creasing with his shirt.
Revealing mistake: Corporal Shah is tied and on a chair in the command center. He then receives a powerful blow to his left check, knocking him sideways and rendering him unconscious. But his glasses do not even move a millimeter.
Revealing mistake: The front view of the pirates in the golf cart with Darcy and Tom does not show the driver turning the steering wheel at all, which would mean the road was straight, but the when the road becomes visible again, it is diagonally behind the golf cart. (00:36:45)
Revealing mistake: The 50 dollar bills that appear in the opening credits all have the same serial number (and you can find online the texture they used with great ease, just like the one for the 20 dollar bills stack). (00:03:45)