Visible crew/equipment: When the evil Superman flies into the junkyard, you can plainly see the wires from the harness. (01:26:00)
Visible crew/equipment: When bad Superman is bending the glass from the bar, watch the right side of the screen and you'll see the reflection of the cameraman slowly sneaking in.
Visible crew/equipment: When Brad opens the door to Gus, cameras and equipment are reflected in the glass.
Visible crew/equipment: When Superman is landing to stop the plough machine, the wires holding him are visible.
Visible crew/equipment: Lighting screen reflected on the police car's trunk by the burning factory.
Visible crew/equipment: When Superman arrives at the steel chimney in the chemical plant, wires holding him are visible.
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.
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