Continuity mistake: When Clark is below the steel lid, the shadow he casts moves around depending on the shot.
Continuity mistake: After the truck falls off the bridge, before Superman arrives a red truck passes by a green one and keeps on to the other end of the bridge. When the angle changes, a split second later, the red truck is now several feet back, not running and parked next to the green truck.
Visible crew/equipment: When Superman is landing to stop the plough machine, the wires holding him are visible.
Continuity mistake: In the Olympics ceremony, the file footage shows no people by the final steps to the cauldron. When the shot changes to the modern footage, a lot of people have suddenly appeared there.
Revealing mistake: When Evil Superman blows out the acid from his hands, the tube used to throw the liquid can be seen for a brief second standing out from his finger (hard to notice but it is there).
Continuity mistake: When Ross is reading a newspaper in his office, the black paper clips move around between shots.
Continuity mistake: Before Gus gets on the skis his shoes are grey with thick black stripes. When he lands he has plain brown shoes.
Continuity mistake: When Evil Superman arrives at the oil tanker, the tower on the deck disappears in the close-up where he opens a hole in the steel.
Revealing mistake: When the two Supermen are fighting in the scrapyard: As evil Superman comes flying out of the acid with his hands cupped, look at his cape. It is wrapped around the front of his waist and legs, not flapping backwards like it would be if Supes was flying forward at speed. Evil Superman is also completely dry during this shot (NOTE: Superpowers have nothing to do with this). This reveals the fact that it was shot with Christopher Reeve (or the stuntman) falling backwards into the vat, then shown in reverse.
Continuity mistake: When Jimmy takes the picture of the Stokis, he lifts his finger from the camera and raises his head. In the following angle he repeats every movement.
Continuity mistake: The toy penguin that catches fire is already burned and damaged, when it's supposed to come brand new from the seller's stall.
Continuity mistake: When the bucket of yellow paint falls on the old man, he turns around and starts to walk backwards. In the next shot, he is facing forward.
Revealing mistake: At the chemical plant, while Superman is landing Jimmy Olsen, the crane that holds them in the air casts a shadow on the green truck behind.
Continuity mistake: The lid that falls on Clark has a bumpy side. One of the shots shows the lid falling with the bump pointing at Clark's head. For the rest of the shots the bumpy part is on the left side.
Continuity mistake: When the bus that Clark and Jimmy are on pulls up to the traffic jam, you can see the smoke from the fire is wafting all over the place. When the angle changes when the two climb off the bus, however, the smoke is limited to the distant view.
Factual error: When Richard Pryor is working his job in the computer room his boss walks up behind him and is amazed at a program that Pryor has written. The boss asks how he did it; Pryor answers that even he doesn't know. Look at the computer screen - Pryor's amazing computer program is just a bunch of worthless print commands that print sentences onto the computer screen; it serves no real function whatsoever.
Continuity mistake: When Superman arrives at Pisa for the second time, the sky changes from violet to blue.
Other mistake: The movies show that Superman can talk and live in space as normally as on earth, with no extra effort needed. Therefore, the scene of Superman choking and suffering inside a shield/ bubble with no air is totally senseless. The Krypotnite laser which does choke him appears after he has destroyed the bubble.
Visible crew/equipment: Lighting screen reflected on the police car's trunk by the burning factory.
Continuity mistake: In the bar, while bad Superman is destroying the bottles, the way they are placed and the ones that are broken or undamaged keeps changing between shots.
Answer: There were rumors that Hackman was angry with the Salkind Brothers (the producers) for firing director Richard Donner, though Hackman later disputed saying that. His explanation, though he may have been downplaying the real reason, was that he had a number of other movie projects at the time, and he also did not wish to continually play the same villain in an ongoing movie series.
raywest ★