Shiro used his powers against Shiro who deflected with his dragons wings . Shiro dodged out of the way just in time and ran away. He was faster than any man alive and he knew it, but there were a few advantages to using his power. One of those was that Keith had been training to fight with swords instead of claws for years now and was much more skilled than he was.
That meant he could take Keith down with him even though Keith didn't know it. He was so focused on dodging and trying to get away that he forgot to keep track of where he was going. As he turned around and went flying into another room he hit one of the walls and fell down on the ground unconscious.
Keith landed next to him, kneeling at Shiro's side with worry written all over his face. He was breathing heavily from exertion, sweat running down his face like raindrops. His white shirt clung to him in ways that made Keith wonder if Shiro even noticed.