What's this image doing here?

[Comatose]

Ok, so I clicked on Riot's name to view his profile, and I look down at his sig, to the right, there's this little guy sitting there, in the white margin:



If anybody could, can they explain what he's doing there?

[Ad Bot]

[Chrono]

It's part of the professor image.
Signature images go outside the box, unless you're using IE7.

[Comatose]

Ok, thanks. Locking.