Other mistake: In the pre-credit scenes when the chopper spots the runaway car, Driver guns it (he clenches his jaw, fists and you hear the engine revving and gears changing) but he never catches up with the two cars only a few feet in front of him (which are proceeding at normal speed) for the whole length of the bridge.Giacomo Chizzola
Other mistake: In both the books and the movies, Harry's Invisibility Cloak can always be seen until it is worn. In Diagon Alley, just before the Gringott's break-in, Ron pulls out the cloak to cover Harry and Griphook, but it turns invisible before he puts it on them. Ron merely mimes the motion of covering them.raywest
Other mistake: The knife used in the Argentina pub scene never has any blood on it, despite being driven into one man's stomach and another man's hand-twice.
Other mistake: When Greg is looking at the video of Rowley sitting on the foil ball, he notices it has only 4 views on YouTube. However, if you look closely, it has 24,963 comments - impossible if it's only been viewed 4 times.
Other mistake: Emmett states that the Cullens "haven't hunted in weeks", meaning all of the vampires should have black eyes. However, all of the actors still have their golden contacts in. This is especially noticeable on the Blu-Ray.
Other mistake: When the chief of police is introducing Porter Nash as the new Acting Inspector he shows a copy of a paper which, if you look carefully, tells about a second cop being shot. Later in the film, the second cop is shot and then the chief is shown to be reading the same paper. (00:13:25 - 00:18:15)Anglo-Viking
Other mistake: In Moriarty's college study, the white King and Queen chess pieces are actually on the wrong squares. Queen starts on her own color.
Other mistake: In the beginning, Eric reads to Hanna from an encyclopedia. He first talks about the blue whale. Hanna asks him about music and then he turns two pages further and reads the article about music. This is impossible if he was looking up the whale under the letter "W", because he then would have had to turn a lot of pages back, instead of further. Also, had the entry been under the letter "B" from blue, it would have been further than 2 pages. He could not have been looking up the word "Mammal", because there would not be more than the mentioning of the name "Whale" under that description, and not an entire explanation plus picture of this animal like in the movie. If he would want info on the Whale like the info he read, he would have had to look it up under the letter "W", this is true in any encyclopedia.
Other mistake: When Graeme is convincing Ruth to go with them and she says "Where would I sleep?", you can see her left eyeball through the dark lens: it moves as she looks to her right twice and then back. In the next scene, it is shown that she doesn't have a visible eyeball in her left eye. (00:45:05)eelynda
Other mistake: The Super 8 cameras used are both sound models, one Eumig and one Kodak, but when the film and film boxes are shown, they are the normal Super 8 silent cartridges, which are square. Sound movie cartridges are rectangular to accommodate the sound recording mechanism in a Super 8 Sound camera. (00:15:55)