This design is neat because it shows the water from above, with legs sticking out as if gravity is holding them up. It also shows a person falling from the ocean into space. It is rather unnerving, and the designer did a good job.
I am not sure what kind of material did this artist used but it looks like he or she used some kind of cellophane which creates interesting look on a painting/picture. RP by the cool iPad for showering with your tablet ;)