Revealing mistake: When Henry's mom is pushed off the cliff her cable is visible.
Revealing mistake: Mrs. Doubtfire sets herself on fire. When she jumps back and starts fighting the flames, it is obviously a stunt double as her face is longer.
Suggested correction: If you look carefully, the face looks pretty much the same, as well as the voice.
The reason the voice was the same is that it was probably an audio dub, which is a voice recording over someone else's voice.
Revealing mistake: When the boys' rival team challenges them, all the boys throw their gloves down, except Yeah-Yeah. When they all go to pick them back up, Yeah-Yeah has to pretend to pick it up.
Revealing mistake: In one of Pickett's charge scene the bayonets are obviously rubber.
Revealing mistake: When Wyatt Earp and the actress, whom he marries later in the movie, meet on horseback, they go on a fast paced ride that concludes after going down a steep hill. If you look at the actress' feet, you will see she is riding side-saddle - a very difficult feat considering the riding they do. If you look closely you can see her real leg, safely on the other side of the horse. The side-saddle leg must be fake.
Revealing mistake: The oil lamp carried by Mary when she first finds Colin has a flame that never flickers, and is likely an electric lamp.
Revealing mistake: In the final scene when Annie and Sam are exiting the observation deck coming towards the elevators, the New York skyline backdrop which should be visible behind them is missing, and the entire sound stage wall can be seen beyond the observation deck safety railings instead. 'Although the exterior and lobby of the Empire State Building, 350 Fifth Avenue at 34th Street, are the real thing, a slightly larger replica of the Observation Deck was built in a hangar at Sand Point Naval Base on Puget Sound just northeast of - where else? - Seattle.' https://www.movie-locations.com/movies/s/Sleepless-In-Seattle.php. (01:39:35)
Revealing mistake: Just before A-Wax kills the guy in the red sweatshirt, you can see the squibs bulging on his back, underneath the victim's clothing.
Revealing mistake: Near the start of the journey, there is a shot of Chance and Shadow running through a creek. This is followed by a shot of Shadow coming toward the camera. As she turns off to the left screen, something on the bottom moves with her. It is likely a guide for the cat to follow.
Revealing mistake: When Robo gets his arm chopped off by Otomo, he stands up and in Robovision, you see that he needs power, but you cannot see Otomo who is supposedly right in front of him.
Revealing mistake: When Andy comes to Joe's office to ask for representation his head is shaven. The transitition of artificial scalp to Andy's neck is pretty badly done, and it looks almost disgusing when he is standing in front of Joe's office after he has been declined. (00:28:30)
Revealing mistake: Al Pacino talks to the older man named Ron in a club filled with mirrors. If you look at Al Pacino's lips when "Ron" is speaking you can see Al coaching the actor playing Ron on his lines.
Revealing mistake: At the beginning of the "Day 50" scene, there is a shot of the "human" meat thawing - in the top right of the screen, a pig snout is visible. (01:13:00)
Suggested correction: There is no pig snout. That is the end of a sleeve that has meat in it for their trip.
Revealing mistake: In the scene where the women are laying in their bunks in the work camp and one lady is describing what she heard about the horrors of other concentration camps, at the end one woman puts up her hands to her face. You can see her fingernails are neatly manicured, something you'd think wouldn't be possible in a forced labor camp.
Revealing mistake: When Ada and Baines leave the island the Maoris pull the heavy canoe with the piano on top across the beach into the water. From the tracks in the sand you can tell that it runs on wheels. (01:44:35)
Revealing mistake: When Frank is hanging off the roof, there is a pipe from which he tries to cling to. The first time we see it there is a white line where it will break. The next time we see it (just before it breaks) the line has been coloured in.
Revealing mistake: Just before the start of the final game which is supposed to be in December we see several shots of the parking lot where it is snowing cold and obviously winter, but yet just before the game starts the camera shows a wide shot of the stadium where you can see rows and rows of lush green trees in the background.
Revealing mistake: When David pushes the pallets onto the car, it's obvious that there is no-one inside. Similarly, when he uses the forklift to pick up the car a few shots later, we see inside the car and there is only a badly constructed dummy-type object in the back seat, and no real people. Even if they had bent down, they should still be visible. (00:09:00)
Revealing mistake: During several scenes, the street lamps are the mercury vapor type which were not used in the 1960's.
Revealing mistake: When O'Bannion got paint dumped on him, he went to the curb to break his paddle. There is already visible white paint on the curb in the shape of the paddle prior to him slamming his paddle into the curb.