The octagon is the ultimate stress test for the mindset required to be successful in business.
The Meta CEO injured himself while training in his backyard.
'You Don't Need to Knock Out Your Competition to Win': Inside the Professional Fighters League's Strategy for Success
Donn Davis, founder of the mixed martial arts Professional Fighters League, explains his master plan for gaining athlete and fan buy-in.
The fighters flip, kick, and plunge into the water, all dramatically set to "Mission Impossible."
"Something about simply endorsing an Irish whiskey didn't feel right to me -- I wanted to create my own."