The UFC's dominant welterweight champion, Georges St. Pierre, knows when he's mentally broken his opponent.

From his last fight with Matt Hughes, to his rematch with Matt Serra, a hard to watch dismantling of Jon Fitch and his much hyped rematch destruction of BJ Penn at UFC 94, that's pretty plain to any hard core or casual fan of Mixed Martial Arts.

In one of FOX Fight Game's most watched videos, GSP sits down with me in the Summer of '08 to discuss his training methods, his mental approach to opponents, and his self-confidence inside the Octagon.

Video: Watch The GSP Interview