Inspired by a half-remembered drawing from a choose-your-own-adventure knockoff book about a haunted house or something. I don't think the original had any teeth, I think the mouth was looser looking, really more emphasis on the sagging skin, and the black liquidy stuff coming out of its mouth was more along the lines of a blueberry compote, as opposed to the cherry pie filling I ended up with.
You can buy stuff with this charming image at Teepublic.
