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 today Continuity mistake: In the scene where after Peter gets his diploma and has a chat with Gwen, he is carrying a backpack on both shoulders. As the scene continues it switches to one shoulder then both several times.
New this month Other mistake: Anna is shown from the front as she ascends an ice staircase inside Elsa's ice castle. There are giant ice pillars to Anna's right and left. They should reflect the side of her face, but instead the reflections show her face from the front.
New this week Continuity mistake: In the scene where Stallone gets hit by the UFC fighter, he doesn't see the hit coming because he gets hit from his right side. Later on, when driving his girlfriend home from the restaurant, he is still blind in his right eye and doesn't see the car coming from the right. However, during the Grudge Match, he is suddenly blind in his left eye.
New this month Continuity mistake: At one point near the beginning of the infiltration of the helicarriers, Captain America's chinstrap has a twist from his right jaw down to where it covers his chin. This is visible in two shots. The next time his right side is shown afterward, the twist is gone. The chinstrap is too tight for it to have flipped on its own accidentally, and the pad which covers his chin is molded so it wouldn't have sat properly on his face even if it had somehow flipped around. There were undoubtedly several prop helmets made, and this one must have been put together incorrectly.
Plot hole: After Bilbo frees himself from the spider's silken cocoon in the forest of Mirkwood, he hides behind a tree listening to the clicks of the spiders "talk" to each other as they wrap up the dwarfs - i.e., he doesn't understand what they're saying. When Bilbo puts on the ring, all of a sudden he can understand the language of the spiders. He attacks one of them, invisible, and he can hear it ask, "Where is it?" Bilbo takes off the ring and says "Here." Then he kills the spider, with the ring off, but he can still understand the spider crying "It stings!" And Bilbo says "Sting. It's a good name." Without the ring on his finger, it doesn't seem like he should understand the spider's language.