Revealing mistake: On Billy's first day of school when he is outside waiting for the bus and it just passes him you hear the noise of kids on a bus, but when it passes no one is in it.
Revealing mistake: A horse gallops through a field and you can see a telephone pole.
Revealing mistake: When "Pop" dies, you can tell he is still breathing, especially if you fast forward the scene. He is just doing it very slowly, but you can see his chest move up and down.
Revealing mistake: When Sam trips over in the cemetery, she falls onto Dear Johnny's cracked tombstone. As she pushes down, the 'tombstone' squashes under her hands. (00:27:25)
Revealing mistake: When Cher is robbed and she calls her brother on a payphone, she doesn't put any money in and she doesn't press enough buttons to be using a calling card.
Revealing mistake: During the monsoon scene, everyone is on a table trying to climb on the chandelier. Peter has been turned into a monkey, and his face is covered in hair and has the characterists of a monkeys face, yet in shots when they are on the table, like when the crocodile snaps at them on the table, just before Alan lifts Peter onto the chandelier, you can see the plain face of his stunt double, with no monkey features! Robin William's and Bonnie Hunt's doubles are rather obvious in these same shots too. (01:17:20)
Revealing mistake: In the final battle scene Morgan grabs a rope and swings from one ship to the other. She grabs the rope over her head and keeps the rest of the rope in front of her. The rope remains taut all the way to her waist. If she were really holding herself onto the rope, it would be dangle loosely below her hand. The tautness of the rope reveals the safety equipment used in the shot.
Revealing mistake: The monitors in the hospital attached to Mr. Banks's wife and daughter didn't move, although they should have shown something important about the patients.
Revealing mistake: In the opening scenes, when the President is walking with Rothschild and his other aides, he leaves the building to walk to the West Wing. In this early morning shot, one would expect the sun to be the only light, but each actor has numerous shadows. (00:03:40)
Revealing mistake: When Brodie and TS are first approaching Jay and Silent Bob there is a very noticeable jump cut just before Brodie says "Hey Jay." [May only apply to the Blu Ray extended edition of the film.]. (00:33:15)
Revealing mistake: When Rimbaud dies, as the nurse covers him with the white cloth, he blinks for a fraction of a second.