Brian O'Floaty

Can you spot him? Can you? 
I have rarely seen a swimmer (floater more so) so relaxed. I watched him for a few minutes, floating on his back, motionless, with his hands behind his head. 
I mean, the floatability of the guy is rather impressive. Or maybe he has a bad case of flatulence and a lot of air in his cranium too. 
I surely can float like that. Must be because I'm a bit... erm... dense.