Castel's point of view. Word: Comfortable.
Castel had never trained with Bourne; he had come later on in the program.
He had heard of him, of course, but he had never put much stock in the stories. They were all simply words, and Castel believed in action.
But when Bourne swept his feet out from underneath him—a dangerous thing to do during a fight, going to the ground with an unknown opponent—Castel realized that he was, in fact, dealing with the man from the stories.
And the man from the stories was as comfortable with fighting, and winning, as he was with breathing.