I have a friend who trains in Tai Chi. Apparently his master is a skinny man who weights about 150 pounds, 20 grown men cannot move him from his spot. I heard other stories about Kung Fu masters who can kill a man with one strike to the chest. I believe it is called Dim Mak.
It is very hard to separate truth from myths, especially when you have to rely on the testimony of devoted disciples who worship their master. I wish there was a sport in which all those claims could be tested, and a man's ability would be measured by his actual achievements rather than myths and legends.
Wait a minute, I think I have a wonderful idea for a new sport, I think I'll call it MMA...