Aut cum scuto aut in scuto
Surfer? I think "skier" would be more apropos, however he must be wearing a white outfit since he's nowhere to be seen.
Really? Is that water or icy mountain cliffs in the background? Looking at the relative sizes, that has to be the biggest tidal wave ever.
The background is a mountain with snow on it, not a wave.
GOTCHA! He is on the top floor of the left turret (water side) watching the show.