
This is one of the most compelling guitar parts in Rev. Davis' entire repertoire. The descending line, D C B G on the three bass strings gets the song moving toward it's chord progression in a way that propels the story.
Using the left hand thumb on the low G note, third fret, E string enables the player to tackle Rev. Davis' famous G7 fingering with it's doubled seventh - the F note on the fourth string third fret and first string, first fret. The high-end break perfectly mirrors the progression.