Comedian George Lopez told Los Angeles television station KTLA that he thought Richards' lack of stand-up experience may have been a factor.
"The question is you have an actor who is trying to be a comedian who doesn't know what to do when an audience is disruptive," Lopez said. "He's an actor whose show has been off the air, he shouldn't ever be on a stand-up gig."
There's a big difference from someone who's actually funny and someone who's reading a script written by someone who's actually funny. And maybe we shouldn't be so surprised that he lost his cool; I seem to recall that fist-fight he got into with Andy Kaufman once.