Mike Houser's now sort of classic bit of Flash animation, in teeth-grinding Accelervision!
We know this guy. You do too. This is the guy who'll show up three years from now really into Buddhism, and will passively twist your arm to try to get you to try it until you finnaly lose it and punch him in the solar plexus hard enough to make him vomit up orange stuff in a Pottery Barn.

Mr. Twitcho [New Grounds]
With thanks to Frank