At Stanford they called this "Duck Syndrome". ("Everyone on campus appears to be gliding effortlessly across this Lake College. But below the surface, our little duck feet are paddling furiously, working our feathered little tails off.", http://web.stanford.edu/dept/CTL/cgi-bin/academicskillscoaching/why-does-the-duck-stop-here/)

I like the description of what's going through your head at that moment. It's really satisfying to get to a point of enough skill at any sport where you can even start to think about stuff like that, as opposed to eg focusing mainly on not falling over.