He slid past me on the floor on his back, admittedly rather stunned from my kick to his face. I turned around and aimed my sword at his face, but he bit it. That didn't really do much since his teeth weren't strong enough to damage the blade.
I just pulled the blade back. He got up off the ground and went to jump at me again and I was tempted to say something, but it seemed pointless. This guy was going to keep attacking me until I killed him.
So I readied my sword, waited for him to jump, and then cut his head off mid air. His head flew into the plants. His body flopped to the ground. Nothing special happened after that.