Continuity mistake: The lime slices on the side of Lex's and Amanda's drinks, in Club Zero, change position between shots.
Audio problem: The CD playing in Lex's car is heard at exactly the same volume and quality from outside the car when Lex has his windows up and when he rolls one down. (00:10:20)
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.