Other mistake: When Ryan gets hit by Martha's car, you can see he has both shoes on as he's going to the ground, and we never see a shoe flying through the air during the hit. Then James and Debra find the shoe in the middle of the street as they watch Martha drive off.
Smallville (2001)
1 other mistake in Stray
More mistakes in Smallville
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.