First of all, you can't ski in Hawaii. Or can you? You'll first need waves so big and special skis made for water. This is German professional skier Willy Bogner, and he's doing it. Check it out below.

The waves look huge. I mean, really huge.

It looks superbly fun too.

Check out the video below":

What happens after? Watch the video.

He also did the exact opposite with snow - Snow Surfing.