Revealing mistake: When Charley stabs Dandridge in the hand with his pencil, he stabs the hand holding him by the neck. The depth of the wound on Dandridge's hand reveals that the pencil should have stabbed Charlie in his neck and given him a severe wound, if not kill him.
Revealing mistake: When Anita lies dead on the ground with her throat slit you can see her pulse in her neck. (00:53:05)
Revealing mistake: When Jesse is cleaning out his room, he puts a tape into his tape player, and presses a button down on the top of it. But halfway though the scene of him packing his things away, you can clearly see the button is no longer pressed down, yet the tape still plays. (00:18:10 - 00:19:00)
Revealing mistake: When Rhodes is pointing his gun at Steele, telling him to shoot Sarah, there's no bullet in the chamber of his gun.
Revealing mistake: At the end, when the Colonel is at his control panel on the phone just after the nuke goes off, the cord from the phone begins to peel from the control panel. This is mentioned in the DVD commentary.
Revealing mistake: In the scene where Herbert and Dan re-animate the dead corpse, watch closely when Herbert rams the little buzz saw into the corpse's chest. At the bottom of the screen, you can see where the fake chest ends.
Revealing mistake: During the scene on the helicopter when the female vampire is developing from the entrails of blood from the two dead men onboard, it is obvious that they are mannequins/dummies as the blood leaves them.
Revealing mistake: When Mark is in the fitting room, it's obvious that his stunt double is playing one of the cuts in the 'mirror' as their moves do not match.
Revealing mistake: On the ledge Robert Hayes is attached to the wall by a wire protruding from his shirt.
Suggested correction: Not true, the ledge was only 2 feet off the ground.