I've seen people pee their pants, vomit, and roll around on the floor (not all at the same time) at Jake Johannsen shows. His specialty is the long, extended anecdote that keeps building in hilarity until the audience has gone absolutely manic. I'm dying to find any recording of his motorcycle / gas-station anecdote, which is the funniest thing I've ever heard.

Someone's ripped his only televised special "This'll Take About An Hour" on YouTube, so check that out as well.