If you ever get the chance to repeat this with someone you know, please do. This is fabulous with the reflection and all; the look on her face battles the carefree feeling of the rest of the image.
I don't know the girl but I'm not that brave. I wasn't really very close. If I were brave enough I would have taken a shot when we walked behind her. It would have been killer, but the girl with her would have seen me.
This was the original and my camera was zoomed in a bit.
This was taken from the same spot and I think even this one was zoomed in a little.
Thankfully you didn't clone out any of her "bits" :) I particularly like the scattered reflection in the sand. It's a harsh time of day to capture shadow-wise and her squinting against this light shows. Did you know her or were you brave to photograph a stranger?