Continuity mistake: When Clark is visiting Lana and Ricky in the hotel, the stuff on the shelf behind them changes between shots.
Continuity mistake: Wood planks appear and disappear behind the rockets in the Grand Canyon.
Continuity mistake: When Superman flies back to Pisa, Giorgio, the seller in the back, is wearing a T-shirt. In the close-up he wears a shirt.
Continuity mistake: When the helicopter releases the yellow strap holding the steel cage, part of it falls over the "W" on the logo. In the next shots it's in a different place.
Continuity mistake: The second time we see the souvenir seller at the Pisa tower he is standing by the side of his stall. In the next angle he is in a different position and place.
Continuity mistake: The people from Archibald Data watching the slapstick of the credits change from being 2 on each window panel, to 4 standing very close together in a single window.
Continuity mistake: During the credits, the amount of water inside the car is inconsistent throughout the scene. The first time it's covering the driver's throat. The second time it's at chest level but the guy's face and hair are totally soaked. Then in the third shot the water's filling the car.
Continuity mistake: When the green car smashes the fire hydrant, a yellow piece gets tucked underneath. In the following shots it disappears.
Continuity mistake: The second hole Gus makes with the axe on the laser ball is smaller a second later.
Continuity mistake: Before Superman fixes the Pisa tower, the Italian seller is seen holding a statue by its base. A frame later he holds it by the side.
Continuity mistake: When Clark is waiting for the steel lid to crush him, he raises his arms up. In the next angle they are down and close to his side.
Continuity mistake: When Gus takes the tablecloth off, he walks on top of the fallen stuff to talk about Superman, and then the amount of stuff left behind keeps changing between shots.
Continuity mistake: During the sequence where Gus puts the table cloth on as a cape, Lorelei's right arm swaps between being between her legs to being on the side.
Continuity mistake: The second time Gus smashes the Krypton beam in the cave, some cables come off. In the next shot the cables are gone.
Continuity mistake: Before Bad Superman drops the bowl of nuts, a coaster is seen behind his left hand. In the following shots it disappears.
Continuity mistake: When the bus to Smallville pulls over, the red ambulance passes by twice.
Continuity mistake: A scene shows some peanuts next to some smashed bottles, note the black ashtray. It is at first sideways, then in the next shot it is straight and continues to change position throughout the scene.
Continuity mistake: After Clark kills bad Superman he rises and the shot changes. His tie knot is now tilted to the right.
Continuity mistake: Amount of snow on the railing changes after Gus flies through with the skis.
Continuity mistake: When the blind man is walking two men from behind disappear in the close up.
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 ★