What I like about this picture is the dog's foot prints coming into the picture and the fact that it seems like you took the picture while the dog was in the air. The picture could have been a bit smaller so that it fits in the screen. I believe the general rule is to try and keep pictures no wider than 800 pixels.
Yes, you definitely caught a very special moment, for the dog's "flying" in this picture and none of its four paws is touching the ground. The reflection in the very wet sand makes this quite clear. This is funny.
I'd prefer a smaller picture for easier looking, too.