Imagine a movie scene situated at a god-forsaken town out in the middle of nowhere. Usually it is somewhere in the Western United States. Typically, you'd see some old gas station, or even a cow skull alongside the dusty road.

In many cases, the vocal instrument sounds like playing a guitar with a bottleneck slide. Sometimes a harmonica is also included.

The long intro to the song Bad Seamstress Blues, Fallin' Apart At The Seams by Cinderella is a good example (before it turns into heavy metal).

What is the name of this musical genre?