When I first completed this drawing I recall it making me pretty uncomfortable at the time. I think it was because it was a little too honest of a self-portrait in some ways. Obviously, I'm much more comfortable with it now, although I'm still not sure what the whole tornado-like thing is supposed to be.
As far as the digital effects go, this was another one of my happy accidents. After a quick auto-adjust of the colors I flipped the negative tweak and, whamo, chalkboard! Who knew?