To be clear, this is in real life. Before he became the third actor to play Ser Gregor Clegane, Hafþór "Thor" Júlíus Björnsson was busy making a name for himself as the second strongest man alive. He stands 6'9" tall and can bench press 500 pounds, squat 770 pounds and deadlift 925 pounds.

Here's a video of him handling an insane 994 pounds in the hummer-tire deadlift. You don't want to mess with this guy. Ever.