The man who plays The Mountain on the TV series Game Of Thrones is an Icelandic actor, and World's Strongest Man title holder, named Hafthor Julius Bjornsson.
He's a 6 foot 9 inch tall beast of a man who weighs 400 pounds and seems to be made of pure muscle, but for some reason MMA featherweight fighter Conor McGregor isn't afraid to face The Mountain.
The fight looks a bit unbalanced, and Conor's blows seem to do very little to mighty Hafthor, but you've gotta admire young Mr. McGregor's moxie!
-Via Esquire