Really? You've never heard of Zach Galifianakis? Never seen the Comedians of Comedy? Well this is a good starter for you:
http://myspacetv.com/index.cfm?fuseaction=vids.individual&vide oid=5605327
If it were me that audience I'd either be (a) laughing openly at other people (especially that chick in the pink sweater doing that crazy butterfly shit with her hands), (b) shamelessly ogling some of the cuter girls in the room, or (c) really straining myself to stay cool to avoid overtly going into (a) or (b) which would basically lead to reacting to this freakshow in much the same manner that Zach is.