I can assure you he probably hasnt sailed in my lake conditions, you know, very light, shifty, light and variable....
Look up Bendigo Victoria on Google Maps. Gashby grew up in a mud puddle.
The thing with his trapezing is that his feet are a long way down the side of the boat too. When you first start to trap low you tend to leave your feet on the gunwale which leads to that upside down feeling mentioned elsewhere.