Nice lightning, personally I think a different (read lower) angle would have made the person more evident in the image which would have added some tension and drama to the shot (even though you can see through them :p )
Great capture. The land portion of the picture is a bit too dark for me, BTW my monitor is calibrated. Being that Shadows and highlights is legal in basic editing I would have liked a bit more light to the foreground.
Great image anyway, I am giving you an 8. Why does the guy look transparent? was he there for only half the time? did you purposely go for the ghost effect?