I thought it was a myth, but unless this has been expertly photoshopped, obviously this guy proves not. I thought it was worth sharing more or less as a cautionary tale that your muscles' limits may be greater than those of your intestines.
Warning: Don't click on the link unless you want to see a disturbing image. It could be worse, but it's not a watercolour painting.
http://poetry.rotten.com/weightlifter/
Horrible socks too.
I mean, following through in the name of your sport is a bit much, but prolapsing your intestines?
Be careful guys and girls.