You guys ever heard of the myth of the riddum? The legend goes that GSP's riddum was an alien creature that landed somewhere in the land of Canada. GSP found the riddum laying helpless in the bottom of a bin when he worked as a garbageman in college. GSP nursed the riddum back to life, he took care of the riddum and kept the riddum fed on a healthy diet of poutine, Canada Dry and other stereotypical food products Americans associate with Canada. The riddum begin to produce ooze that GSP would milk and create 'riddum shakes.' He drank the riddum, perhaps even overdosed on the riddum and the end result was being named (possibly) the best pound for pound fighter in MMA.
Back in 2005 at the ADCC tourney, GSP's riddum was overcome by a guy hailing from the Nova Uniao gym, Léo Santos. If you're into watching reality shows that depict shirtless men duking it out for MMA supremacy, then you can see Santos on this season of TUF Brazil II, which will include English subtitles for online streams of the show. Check out this clip from the 2005 ADCC of GSP and Santos getting down on the mats, followed by a simply amazing flying armbar. Props to the Sherdog Forums for the find.