Jack Black says he's retiring from acting.

I saw a news item on him some years ago-an interview which attached him to a documentary about a comedian who ruined his big break Tonight Show appearance. The guy was named Randy something. His routine was so-so-he did impressions of Reagan, and then Ed McMahon. Then he did Johnny Carson and the audience gave a disapproving response and Carson thanked him but was visibly annoyed. The comedian later said the goal was to get invited to sit down and he was not and he was discussing how he blew his big chance by doing a no-no--making fun of the host. Not sure why Jack Black was an authority on this comedian or subject.