I saw this pic on JUB the other day. It was posted by Princessmedion.
The pic is of wrestler Martin Kirby (whose ass is out) and his tag team partner Joey Hayes.
This was during the years Martin wrestled in Preston City Wrestling. After some searching I found the event where this happened. Basically, Kirby was actually putting his tights on in the middle of the ring. The ref and and Hayes were using towels to cover Kirby. Hayes, however dropped the end of the towel that was covering Kirby’s butt. Kirby ends up mooning a section of the crowd. What’s disappointing is that it all happened at the wrong camera angle!! All you see is a quick glimpse of the side of Kirby’s ass. (Sigh)