"You sort of--" There's an obvious lag as he can't quite come up with the word in English. His fingers clamp tighter around the stone as he demonstrates a flicking motion. "You want to-- fast? But the spin is more important. Look."

He's got the slightest bit of a wind up, like a baseball pitcher pulling back before stepping into a throw. The stone leaves his hand for three, four skips before dropping below the surface of the water.