Webby award,) The Hangover which I only recently saw and liked, but the thing he has done which made me laugh the most is his comedy DVD Live at the Purple Onion. I laughed more watching that DVD than when the Broncos drafted Tim Tebow and every season of The Office combined. Of course, I don't find The Office funny. They could easily make a funny show, but choose to do otherwise. My meaningless critiques aside, here is a video I found on Funny or Die of Zach discussing physical comedy with short appearances from Patton Oswalt and Brian Posehn (from The Sarah Silverman Program.)
Be warned, there is some brief partial male nudity so the video is probably not safe for work unless you work at a company that works with male nudity, queer. O wait, that's supposed to go before the video. Why do I always mess that up?