It takes a lot to make me laugh out loud, especially commercials. (Usually the clever ones originate in Australia or the U.K.)
When I worked at my old ad agency, back before the internet, the whole agency would hie itself to a local theatre once a year to watch the world's best commercials. Ah, good times. Now we just go to YouTube.
My niece in Colorado sent me this tongue-in-cheek gem and I've since seen it during American Idol. The last line was so deliciously random I got the full on snort-giggles.