Richard Pryor shows off his skewering skills in this classic stand up comedy video clip. As he talks about cleaning up his life and getting off drinking, someone in the crowd questions the statement that he has been clean and sober for over a year. While the guy in the crowd yells out that he doesn't believe it, Richard Pryor comes back with, "Well, you don't have to believe because you're drunk yourself."

The crowd responds with a loud chorus of cheers. But they don't stop there. For some reason this sets off more in the audience to yell things and at one point an audience member yells something about Pryor's mama. Which stops Richard in his tracks and he calmly says, "I am going to slap you in the mouth with my dick." The audience, of course, goes crazy. I wish I had the chance to see some Richard Pryor stand up just once in my life.

Dealing with hecklers is an art form. You can't give them too much rope because they will run with it and then take away from the show and take the comedian out of their rhythm. It's usually just someone who wants attention, anyway. So why give it to them?

But to win, you have to say something clever but devastating. That usually embarrasses them and shuts them up for good. Richard Pryor did just that here. And that's why he is one of the greatest stand up comedians of all time.