Question: In the nightclub, Mel Gibson shoots a guy who says "Hey, what are you..." Was he a bad guy, or was he just a random citizen?
Question: Who's the actor that played the jumper...? IMDB doesn't say... I thought I heard once that it's Mel Gibson's brother? He looks like the character "Johnny" in Mad Max.
Answer: The jumper's name was Len McCleary. He was played by Michael Shaner and is credited for the role in the film (and on IMDB).
Answer: Also, "Johnny The Boy" from the first Mad Max film was played by Tim Burns, according to Wikipedia; not only is he a completely different actor, but he is also obviously not Mel Gibson's brother.
Chosen answer: He was one of Hunsacker's men.