That picture has a long and not very interesting story. I took it when I had a shit camera, for a contest. It gathered dust on my Brickshelf for a few years until I joined this forum and needed an avatar. A few years after that I got a good camera. But I can't think of anything that would make a better avatar.
Remus: Harry... I'm a werewolf.
Harry: Are you fucking serious?
Remus: Well yes, but I don't see how that applies here.