Revealing mistake: In the scene at the end of the very first battle, where Imperial troops have just taken control of Princess Leia's rebel ship, Darth Vader breaks the neck of the rebel leader and tosses his body to the wall. The "dead" rebel puts up both of his hands to avoid slamming his face into the wall.
Picture submitted by Dr Wilson
Continuity mistake: After chasing down Sully, the yellow Porsche is totally wrecked on the left side, until Arnie drives it away, and it's fine.
Continuity mistake: After Gerry gets smacked in the face by the 'broken' suspender clasp, we see the silver clasp land under the dresser. Yet, when he's moaning and lifting his leg to get onto the bed, we can actually see the clasp still intact on the front suspender that came loose, which is dangling right behind him (just look between his legs). Of course, in the next shot, that clasp is gone. Since the silver clasp is one of the plot points, this is bizarre to say the least.
Continuity mistake: When John and Catherine are in the hangar at the runway, the Cessna's tail number is N3035C. When the plane is shown in the air, the number is N3973F. When they land, the tail number has changed back to N3035C.
Continuity mistake: In the bedroom scene the girl is holding a clear cup full of beer. The camera goes off her and when it comes back she is holding a blue cup. The camera goes back off her then on her and the cup is clear again.
Continuity mistake: When Sam is in his bedroom, after he finds the Cube sliver it falls and dramatically burns a hole through the floor into the kitchen. But Sam's bedroom is over the living room (there is nothing on the ground floor below Sam's elevated bathroom, and in the first movie Jazz hides in this open space), and the kitchen is actually located between the den and dining room, at the other end of the house. If they were to follow the actual floor plan of the house, the Cube sliver would have landed in the area of the piano in the living room, but where would the fun have been in that?
New this week Factual error: When Stallone and Grammar are going to see Galgo, they are supposed to be in Arizona. The car they are in has a European Union license plate.
Other mistake: In the scene when Fingers and Lucky are going over the bank heist plan, Lucky is wearing a blue suit where the sleeves go all the way down to his hands, but in a close up when his hand and a bit of his arm are seen, but the sleeve is missing. It reappears in shots afterwards.
Plot hole: Liam Neeson repeatedly asks the pilot to descend in order to minimize the impact of the bomb on board. The pilot is very reluctant about it, as he is requested to maintain his altitude. Eventually, the pilot says "F*** it" and goes into a radical nose-dive. The bomb explodes and the plane must do an emergency landing on the landing strip. However, the plane was supposed to land anyway there, so why was the pilot forbidden to descend? A normal landing, as opposed to the nose-dive, would require a lower altitude twenty minutes earlier anyway.
New this week Plot hole: Once the countdown to release the poison has been stopped, The Shredder cuts the supports of the tower holding the poison container so that it will fall and release the poison by smashing open. The turtles attempt to support the tower, but in order to save April they fail and the tower falls anyway. Then the movie forgets that the poison exists. The act of the tower falling gets rolled into another action sequence and after it completely smashes to the ground, no poison. The turtles don't even mention it.