Damien Gareth Walters is a former British gymnast from Derbyshire who specialises in tumbling. Walters has had the role of stunt double or stunt performer in a number of famous films, such as Hellboy II, The Golden Army, The Eagle, Blitz, and Captain America: The First Avenger. In Kick-Ass, he was credited as both a stunt double and assistant fight coordinator. He will also appear in the films Sherlock Holmes: A Game of Shadows and 47 Ronin. On YouTube, he is one of the most watched Freerunners, with his videos having a total of over 60 million views.