Maratsmaiden: Yes, yes. "The Strut." Or, swagger. Or, amble. Whatever it's called, it's awesome. It's cocky, even.
The thing is, he doesn't seem cocky *at all* off the court. But on court, he uses it to his advantage. Players like Nadal and Del Potro intimidate their opponents by jumping/hopping/bouncing showing how energetic and ready for battle they are. Marat has enough presence to just stand there and intimidate people. Kind of like Russell Crowe in Gladiator. Other players have commented on it. Did you hear Verdasco in the "goodbye video"? He said, "So, big. So, strong. You have to be careful what you say about him."
I can tell you this much. If I showed up for a match and saw this as my opponent, I'd be scared, too!