Gregor "The Mountain" Clegane is one of the most evil characters in all of "Game of Thrones" -- and considering this is the same series that spawned Joffrey Baratheon, that's saying something. He's massive, brutal, and in Sunday night's duel with Oberyn "The Red Viper" Martell was involved in something so shocking that people are still talking about it. Casting a guy who could convincingly portray the 8-foot-tall knight was no easy task (two other actors played him in earlier seasons), but the producers seem to have found their man in Icelandic strongman Hafthor Bjornsson.

Bjornsson is 6-foot-9 and 420(!) pounds, numbers that make him a perfect candidate for lifting astoundingly heavy things. He's competed in the World's Strongest Man competitions since 2011 and has been steadily progressing up the leaderboard, culminating in a second-place finish in this year's event. Here he is lifting almost 1,000 pounds like it's no big deal:

If that's not convincing enough, here he is (painted oddly but perhaps understandably in Hulk green) tossing a washing machine:

Back in 2013, the Colts even flirted with the idea of signing Bjornsson to a tryout, which we would have given just about anything to see:

Off/Def Lineman,so many 6-3 to 6-7..320-365 lbs/Big,Physical and Nasty! Speaking of size/strength..GM Grig's just might sign "The Icelander"

— Jim Irsay (@JimIrsay) May 13, 2013

Fortunately for Pedro Pascal, who plays Oberyn Martell, Bjornsson seems like a much, much nicer guy in real life: