There is something about this pic which is a bit odd. It's kind of like they've deep etched other people out of it and put it on a different background or something like that.
After seeing what the same Photographer (Mark Evans) has done with the pic in this thread (http://www.sharksforever.com/forums/showthread.php?t=65702) I wouldn't be surprised that there is a fair bit of digital farnarckling going on here.