I already know that that guy is one tough SOB. I watched his olympic match against the Russian wrestler, aka "The Experiment" (undefeated for 13 years). Is wasn't a pretty match, heavy weight matches rarely are, but they beat the hell out of each other.
It seems he's just one of those lucky guys that can take a beatin' and just manage to keep breathing. Actually might not be a bad person to have around in an adrenaline situation...
J