He's best when he's just hanging out with friends. His appearances in the documentary "Dreams With Sharp Teeth" (about the AWESOME Harlen Ellison) were great. Those two had each other falling off their chairs laughing.
I should totally check that out because honestly that HBO special was totally a huge disappointment. I have seen him with other friends before and when he gets together with friends they just kill each other with laughter. Even though it's the best medicine it sure can't cure a busted gut. (totally worth the pulled muscles though)