Klondike posted one from Secret Garden Party '08 elsewhere, but it wasn't one of these: mud and costume slippage; apologies if he's a) the only one who fancies them and b) has already seen 'em. More similar and MUCH larger (more than 3x as wide AND more than 3x as high: you do the multiplication!) at
http://www.flickr.com/photos/boutros...57606473946860