Entering Heaven is like wandering into a play where everyone already knows their mark, their part, and their script - except you. And you make the mistake of bumping into the spotlight during your debut.
Or, you run into Adam on your first day and things spiral from there.
You killed one man, and it ended up with you in Hell. Not only that, but your demon form is that of a vampire bat.
I suppose another one BITES the dust, eh?