Ken Shamrock is a UFC Hall of Famer and a star from the early days of WWE's Attitude Era; he's also one of the few wrestlers to fall out with Vince McMahon so thoroughly that he's never, ever returned to the company. We sit down with Jonathan Snowden, acclaimed author of a new Shamrock biography, to discuss Ken's thoughts on pro wrestling and to dissect what makes the World's Most Dangerous Man tick.