?If you saw what he did to Oberyn Martell, you’d well know it's not a good idea to fight The Mountain. On top of playing a character that cuts the heads off horses on Game of Thrones, actor Hafthor Julius Bjornsson also happens to be the World's Strongest Man. To take that guy on, you'd have to be a total badass who isn't afraid of being crushed into a fine paste. Irish MMA fighter Conor McGregor is that kind of badass. Observe: It's like watching a ripped small child challenge a giant. When he punches him in the abs it sounds like he's hitting a brick wall. Enjoy this sparring session. –Greg
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