Hafthór Björnsson, nicknamed Thor, is a mountain of a man. After all, he does play Gregor Clegane on Game of Thrones whose known as The Mountain. In real life the actor just accomplished a feat known to Icelandic legend that hasn’t been done since the days of vikings. The stories tell of Orm Storolfson who carried the mast of the viking ship Ormen Lange on his own shoulders, for three steps which weighs 640 kg (1410.96 lbs.) Hafthór Björnsson carried it for five.