Batman Arkham Asylum - Insane Person What?

I'm not exactly a big batman fan, was born at the end of 1992 so I wasn't exactly reading a lot of the comics, I only ever saw a few of 'New' animated series episodes. So I don't really know if this is a reference to anything, but its been bugging me.

http://i194.photobucket.com/albums/z240/MaxCrisis/untitled-11.jpg

Just who the HELL is that guy? He walks backand forth grunting, and doesnt do anything other than that.

just a random inmate if im not mistaken.

That's Clayface if I'm not mistaken.

Ah, nevermind, I was wrong. Hereis your explanation.