Continuity mistake: When Lucas is in the Luthor mansion talking to Lionel and Lex, he picks up and inspects the samurai sword, then returns it to the holder, hanging it on one peg by the strap. In the next immediate shot, it is resting between the pegs, as it was before he picked it up.
Continuity mistake: The motorcyclist has his visor down when he appears at the end of the alley. He raises the gun, then reaches up and lowers his visor again. (00:27:00)
Martha Kent: Clark? What are you still doing out here?
Clark Kent: Well, I'm still doing my chores.
Martha Kent: Well, you usually finish those in about two minutes. How is it that I drove to Metropolis, attended the Children's Foundation dinner, and made it back before you finished?
Clark Kent: Because I'm doing them the normal way.
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Answer: No, there is no such character in the comics. He's a "meteor-freak" like all the other baddies on the show. The sound has something to do with him vibrating his vocal cords very fast to create a high-pitched squeal.