Mental visualisation. You and I do it in the torpid moments between wake and sleep, or maybe while sitting bored at our work desks. Meanwhile, what seems like a fruitless mental escapade to us is used as a training technique on professional athletes. "Imagine yourself winning!" says the coach. "What do you see?"

What we call daydreaming a professional calls preparation, but no matter what kind of surfer you are there's a good chance this is what you see when you close your eyes and visualise.

Bruno Santos, mental perfection, Teahupoo.

Sequence by Tim Bonython.