He's not the only one in America that would like to enter a competition, as you know, though the others are far less efficient than him. In fact if there was a worldwide challenge I've seen quite a few who'd be keen. It would have to be held in The Home of Megaliths though, it just wouldn't be the same anywhere else. But I'm prepared to bet anyone 50p here and now that you'd win with stone rowing as you can't improve on perfect efficiency. Maybe you'd be safe to bet your house against his....