Offense Intended: 'Joan Rivers: A Piece of Work' (2009)
Rivers regularly caused offense, but remained unapologetic. (In the era of shaming comedians and demanding apologies, she is a touchstone.) In this clip from the excellent Rivers documentary, Joan Rivers: A Piece of Work, she wrangles with a (former) fan when he doesn't like her jokes about deaf people. She tells him comedy is about processing the most difficult things in order to laugh about them: "We're going to talk about what it's like to have a man with one leg who lost it in World War II and then went back to get it, because that's littering."