Character mistake: In the Air Force One scene, when lightning destroys one of the plane's engines, one of the pilots tells a co-pilot to inform Metropolis Airport that the president is on board the plane. The crew is unnecessarily repeating themselves: just a few moments before, they radioed in that "Air Force One" was on approach; the plane would only have that call sign if the president was on board.
Superman (1978)
1 character mistake
Directed by: Richard Donner
Starring: Gene Hackman, Marlon Brando, Ned Beatty, Christopher Reeve, Margot Kidder
Factual error: When Superman is turning back time by flying around the Earth, right before he starts orbiting the Earth is spinning way faster than it actually should be. If the Earth actually spun that fast, a day would pass by every 1.44 minutes.
Trivia: The famous (or infamous) New York City blackout of 1977 occurred during location shooting for "Superman." According to director Richard Donner, cinematographer Geoffrey Unsworth mistakenly believed he had caused the blackout by plugging in a spotlight to a lamppost while filming.
More questions & answers from Superman
Answer: He wanted to see for himself if the stories were true. Some reporters tend to exaggerate the facts and if he had any other weaknesses. He couldn't be sure the kryptonite would work.
While I don't exactly disagree that Lex wanted to see for himself how invincible Superman is, I don't think that's the main reason why he did it. The bullets and fire were simply a charade to make it look like this was his security system. Keep in mind, he wanted Superman to enter his lair because the real trap was the Kryptonite that he had in the lead box.
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