That clip looked like one of those walk-in comedy clubs, like where anyone can go on stage and perform their act. I can't see someone like that getting their own spot in a program, no way! Sounds to me like he had too much to drink, went on stage to cause a ruckus and get attention.

It was uncalled for but I did laugh when he said, "you calling me a cracker ni**a!?" I'm not racist, it was just the way he said it.

EDIT: Tha guy was on Seinfeld? Which character did he play?