Dave Chappelle pushes the same boundaries that once got Lenny Bruce arrested

Part of the fun of watching edgy stand-up comedians is what I call the "Demolition Derby Effect."

Just as demolition derbies were born out of the belief that a lot of ticket buyers would rather watch cars wreck than race, a lot of people pay to watch edgy comedians in the anticipation that maybe, just maybe, any minute now they're going to (gasp!) go too far.

In that regard, notoriously edgy comic Dave Chappelle takes the