I think the movement in this game, although difficult to control, is pretty fun--in particular, I like that jumping out of the water is just a matter of literally pointing yourself towards the water and building up enough speed. It just has a good game feel, I think.
As such, I did try jumping out of the water a lot, but I wasn't able to figure out how to score an aeriel somersault. I couldn't manage to somersault over the boat (only over empty water), so maybe that was my problem.