Professional mixed martial artists are the physically toughest men on the planet. Many (most) of them have had difficult upbringings, but this has changed in recent years, due to the fact that the sport has gone more mainstream. But something always keeps my attention whenever I see a one sided fight: the heart of the man getting bested. So many times in a fight have I seen a fighter who has no hope of winning simply stay in there when he could so easily opt out of the contest. Is it pride that keeps him going? Is it the prospect of money? Maybe it is the simple drive that exists within all of us as humans to simply persevere.