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? (00:12:30)
Continuity mistake: After Sarah and Rios come out from the flooded cave, their clothes are bone dry even though there were almost fully submerged underwater. (01:01:25)
Continuity mistake: In the scene where Parker is shown playing golf on the indoor golf course in RDA, the first time he hits the ball, there are two other balls lying on the course side by side. In the next shot, two are distant apart and in the shot after that, they are in their original position. (00:12:15)
Continuity mistake: When the house first becomes detaches from its foundation and becomes airborne, Russell is nowhere to be seen, although every angle of the house is shown, including underneath, the front porch and the back porch. He knocks on the door and tells Carl he chased a "snipe" under the porch - but he cannot be seen after liftoff and prior to knocking. The same thing happens near the end, when Dug claims to have hidden under the porch.
Continuity mistake: In the scene where Blair escapes with Marcus and Barnes launches an explosive into the tunnel, Marcus hops onto Blair to save her from the scorching flames. After the fire, Marcus' coat would have been burnt to a crisp, his hair singed off and the skin on his back fried. More evidence pointing to this was that his coat was merely one previously worn by a Resistance fighter, not special in any way, and he has regular skin and hair. (01:06:50)
Continuity mistake: When the law enforcement officer arrives, there is a tight close up on the handle of his .38 revolver. When one of the aliens scans his body, an image of a .45 1911 appears instead.
Continuity mistake: In the dormitory, when lovestruck Ron is going gaga over Romilda, he is wearing a brown sleeveless tee shirt and its tan trim has many holes. When Harry brings Ron to Slughorn, Ron is still wearing that tee shirt, but now some of the holes are gone and the rest of the holes have changed position. (01:26:50)
Continuity mistake: In the scene where Watson and Adler are laying out the map, they place two objects on the map to hold it down. In the very next clip where it shows Holmes talking, you see Watson and Adler placing those same objects on the map.
Continuity mistake: When Grumpy jumps the chasm to chase Dr. Marshall, there's a large green bulbous plant that moves from the side Grumpy jumped from to the one he lands on. It wasn't there before.
Continuity mistake: After the car chase, the front plate of the taxi is hanging on one side. Moments later, while driving the cab and fighting the other "alien," the plate on the taxi is in a different position (semi-fixed). (00:46:00)
Continuity mistake: In the scene where they are playing 20 questions, the barmaid and the barman are invited to join in, in the next shot they are back behind the bar and then a few moments later they are playing 20 questions again.
Continuity mistake: While being held by the two kidnappers, both Neal and Mellissa go from being handcuffed together to being handcuffed individually, and then back to being handcuffed to each other once again.
Continuity mistake: At the end of the film when Kirk is being awarded his medal, behind the Federation Counsel you can see 3 flags in the background- the center flag is the California state flag. After Kirk shakes Pike's hand, and the camera pans up and back, the California flag is hanging significantly different so that it is no longer recognizable, seeming almost blank white. As the ceremony is indoors and all attending are standing motionless, this flag should not have moved. (01:56:25)
Continuity mistake: When 9 meets 3 and 4, they open his zipper. During this scene, several close-ups show 9 with the zipper closed and open again without anyone closing or opening it.
Continuity mistake: In the scene where Clouseau is having his hair shampooed, the amount of shampoo on Ponton's hands changes, and then the suds disappear. (01:07:40)
Continuity mistake: Watch carefully during the scene where Hurley gets launched by the sprinkler. When Darwin says, "Come on, soggy," as he is walking away, the camera pans back to show Hurley still lying on the concrete, we see little guinea pig footprints in water on the sidewalk. They weren't made by Hurley because he hadn't moved and Darwin had dodged the water and was completely dry. Nor did he walk in the water either.
Continuity mistake: When Ana returns home to her husband, they converse outside the house. He asks her how it was in Monte Carlo. As he asks her this, she is entering the front door and he is about 8 feet behind, following her. The next shot shows them both in the house, and they are very close together when she answers that she didn't get what she want. (00:25:15)
Continuity mistake: When they go into the garbage chute Hutch goes in head first, but comes out at the bottom feet first yet had no room to swivel round.
Continuity mistake: After escaping Bean Annex on the motorcycle by going off the ramp, Kylie turns back, sees the wolf and does a double take, and tells Mr. Fox "don't turn around". But when everyone looks at the wolf in the next shot when the motorcycle has stopped, they're looking off to the side of the road, not behind them. (01:11:20)
Continuity mistake: As Chuck first arrives on Planet 51 he takes a few steps. The ground in front of him is clear. As he plants his flag down he steps on a duck which wasn't there before.