Watch the Funkadelic online guitar lesson by Robbie Calvo from The Rhythm Architect
This is a I7-IV7 groove from G7 to C7. The main guitar part is our typical barre chords with a 6th string root note but I'm also hammering on from a minor 3rd to a major 3rd and then suspending that on each of the chords. You could say I'm creating a simple melodic hook within the framework of the chords. Don't underestimate the value of being able to play this chord move as it is used often in many genres of music.