This is a baby hognose snake I found in the yard the other day while taking out the trash. These harmless snakes put on a show by flattening their heads into a hood, inflating their bodies, hissing, false strikes (they don't bite), defecating/musking, regurgitating and playing dead. This particular specimen didn't use EVERY trick in the book, but he sure gave it a shot.
I released the snake the following morning in the spot where I found it. See another hognose snake I found in my yard here and read more about these interesting tricksters.