Everything was normal, then he unknowingly hit on his friend, and ended up in Equestria. Now he must struggle, against his own anger, the forces of darkness, and some rather hungry creatures that would love to make him into a snack.
This is a part of the story universe called "Chess Game of the Gods", which was created in Rust's mind in the form of "The Ballad of Echo the Diamond Dog" which was continued upon by Blackwing in his story "Griffin the Griffin", and now there are humans running about in the world to amuse some crazy gods.