The Greyhound Bus is used as a metaphor for leaving a relationship, home, a job, etc. Since the roots of this come from the Upper Midwest I hoped to flavor the song with that local color. The Hull Rust Mine is the world’s largest open mine pit and acts as a backdrop to where the relationship may end up.

Not a happy ending.

More information:
100th Anniversary of the Greyhound Bus

http://www.greyhoundbusmuseum.org/buses.html