Revealing mistake: After Dr. Lawrence cuts off his leg and is crawling towards the gun, if you look at his dismembered leg, you can make out the shape of his foot hidden beneath his ripped up slacks. (01:29:30)
Revealing mistake: Just before entering Robertson's office after climbing the stairs, Spooner is behind Sonny with a flashlight. The light shines on Sonny's back and the door, but Sonny does not cast a shadow.
Revealing mistake: In the beginning, there is a scene where Sen. Shaw is watching Raymond make a speech on a TV screen. It was obviously put in in post-production because the aide immediately next to the screen is nodding and clapping in agreement at inappropiate times.
Revealing mistake: When Shooter pins Mort against the tree with the shovel, you can see that it's a rubber shovel because it's bending around Mort's neck. [Mentioned on commentary]. (00:40:45)
Revealing mistake: At the fight scene in the cave, you can see the gun clip has no bullets in it.
Revealing mistake: When Velma is running from the two one eyed skeletons she goes into what looks like a warehouse and the floor is all wet and in some places there are puddles. When the skeletons come they step into a puddle but the water doesn't even splash or ripple. (01:11:20)
Revealing mistake: When the demonstration crowd is assembling in the plaza, there's a yellow tram entering on the left hand side. Watch as someone walks across the tracks in front of it and disappears through the corner of the cab. The shot must be a composite of the crowd amassing and the tram shot separately and then overlayed.
Revealing mistake: When the kid and the coach are throwing the little boxes of corn flakes in the air the kid's last couple of boxes were pre opened.
Revealing mistake: When the musicians stop playing and the world leaders start getting up from the table, it goes to a shot spanning the entire table, but also showing the musician's stage. This is where you see the mistake, as you see Berkhamp suddenly at the front of the stage wearing his headband and dancing, when it cuts away from that shot, it shows Berkhamp is still sitting behind his instrument with his headband still off. Then we find that out of place shot was recycled from when Berkhamp actually was onstage and dancing as we see the exact same shot again less than a minute later, this time the shot is where it's supposed to be however this is still a mistake and quite an odd one. (01:26:25)
Revealing mistake: When the detectives were listening to the message on the answering machine, we heard it say the date was Thursday and states a time the message was left. When the camera shows the answering machine, you can see the display blinking between 1 (the current message) and CL (which indicates the time and date have not yet been set).
Revealing mistake: On each of Sky Captain's hangar doors, the windows are broken in the exact same places, indicating the same window rendering was simply duplicated to make the others. (00:16:45)
Revealing mistake: When Ivy is running along the path in the woods, right before she bumps into the wall there are two large tree branches lying in her way. She shortens her steps and hops over both of them, even though her walking stick never touches them and she should have no indication that they're there.
Revealing mistake: When the man is melting after being covered in acid in the beginning, you can see a wire pulling the "melted skin" off his arm, at the bottom of the frame briefly. (00:04:00)
Revealing mistake: After Trevor is hit by the VW Bug, the arm he lands on disappears partially into the street, making the CGI obvious.
Revealing mistake: After Jonny Lee Miller gets shot in the head, he slowly falls into the water, facing Sara and Gabe. In the next shot, he has turned towards the water. If you watch closely, you can also see him turn his head so he doesn't hit the face on the water surface. (01:34:15)
Revealing mistake: Matt, the boy killed at the beginning, has very short hair. His dummy (the one hit by the white van) has much longer hair. (00:05:40)