Fans of HBO's "Game of Thrones" know this man as "The Mountain," Queen Cersei Lannister's brutal body guard. His real name is Hafthor "Thor" Bjornsson, and as you've probably already guessed, he's an athlete.

This weekend, Bjornsson competed in the annual New Hampshire Highland Games and Festival in Lincoln, according to The Associated Press via NY Daily News. It was his third time taking part in the event, which is reportedly one of the largest events of its kind in the country.

If you're wondering whether or not "The Mountain" gave reporters any clues about next year's eighth and final season of "Game of Thrones," the actor said he's been "sworn to secrecy."

According to the NH Highland Games and Festival Facebook page, Bjornsson broke a world record for granite block lifting (341 lbs.) on Saturday. However, someone commented that he shares the record with Steve Schmidt from Ohio. Watch this impressive feat:

This video shows Bjornsson setting a new world record for the "weight over the bar" competition a few years ago: