So through a jibe, for example, the helmsman steers down and starts to feel the roll moment. The power comes out of the rig as the apparent wind goes forward. The bit that makes it quite difficult is that when the new board drops into the water, the physics are unpredictable; depending on how hard it hits the surface. For example, if you’re high flying, the board hits the water with a lot of momentum, and quite often with a big splash. Once that happens, you’ve blown all the water away, and as the board goes deeper, the water sort of folds in over the top, and you get this bubble attached to the foil that gets carried down. The board then can’t generate any lift until that bubble washes away. It’s a fraction of second, and while sometimes it will go in nice and clean and hook up right away, there’s this moment of trying to figure out what it’s going to do.