Continuity mistake: During the tablecloth scene, while Ross listens to Gus, the coffee pot located a meter to the right appears right behind Ross between one frame and another.
Continuity mistake: When having a picnic in the wheat field, Clark and Lana's position to the tree and the car nearby changes between shots.
Continuity mistake: After the blind man walks through the painting, the shape of the broken part changes on the angle behind.
Continuity mistake: In the bowling alley, before Clark sneezes, his hands are covered in talcum powder. A second later he raises his hand to fit his glasses and it's clean.
Continuity mistake: Inside the bus to Smallvile, the landscape outside is always an empty and vast wheat field. However, from the shots outside, it swaps to a huge factory. This changes back and forth.
Continuity mistake: The driver's window in the cop car by the burning factory swaps from rolled up to halfway down between shots.
Continuity mistake: Before the truck is about to fall off the bridge, the blue car in the water moves from a 5 o'clock direction, to a 3 o'clock depending on the shot.
Continuity mistake: At the acid storage room, while the chemist says that the temperature can't rise to much you can see the needle on the background way to the right revealing it's hot. But the next shots of the needle show it on the very left first and rising on the second.
Continuity mistake: When the green car crashes, it leaves a lot of rubble in front of it. In the wide shot, the street is clean.
Continuity mistake: Vera stands to turn the TV off in the close shot and a second later, in the aerial shot, she repeats the movement.
Continuity mistake: The file footage of the torch shows it's burned around the rim. When the shot changes to fiction footage the burning is gone and the metal is spotless.
Continuity mistake: When Superman fixes the tower of Pisa, the Italian seller turns his head around. The movement cuts to show a new angle but the new movement is totally different to the previous one.
Continuity mistake: In the end, when Brad jumps on the bed, the wide shot shows him stepping on the right end of the mattress, but the close-up shows him stepping on the left end.
Continuity mistake: While Jimmy Olsen looses balance on the ladder he holds himself but stays on the ladder. A second later he is already off of the ladder about to fall down.
Continuity mistake: When the chemicals explodes, the firemen by the chimney fall down twice.
Continuity mistake: While Superman is grabbing the steel chimney, the worker in the far left is seen hurrying to the right to meet his pals. In the next shot he is repeating the movement again.
Continuity mistake: At the chemical plant, while Superman is breaking the chimney, a worker at the far right climbs up twice.
Continuity mistake: At the chemical plant, while Superman is grabbing the chimney, a worker in the back with a blue helmet aids a man to climb up. But in one of the shots in between he's seen away from him, doing something totally different. Then in the next shot he is back helping the guy.
Continuity mistake: When Superman is about to tilt the Leaning Tower of Pisa, he places his hand with the thumb up. A frame later it's down.
Continuity mistake: When Clark is visiting Lana and Ricky in the hotel, the stuff on the shelf behind them changes 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 ★