Very cool. Always nice to capture these types of moments. The person on the beach tells you how grand this is and can easily be cloned out for the non-human element look.
I would echo David's comments and suggest a little bit more room on the left and lower-left corner would have been nice to cushion the water and to help ground the image, respectively.
The atmosphere in this image is very powerful and Robert is right that the inclusion of the person on the beach certainly lends a sense of scale.