Now you're going to get a lot of strange theories about this one. I'll just say, dude was caught in a rather "compromising" position, and leave it at that. Interesting post.
I want to say he was about to take a piss, when muggers struck him from behind. Maybe you can come up with a better theory, **Lady. I'm out of ideas (except the real raunchy ones). But being this is Easter Sunday, I won't share it.