Watch the Southern Jam - Rhythm online guitar lesson by Jeff Scheetz from Rock Solid
There is something about southern rock grooves that just gives you that happy feeling. Many times the chord progressions are fairly simple but with the little slides and twists it keeps it interesting.
This one uses chord slides to give it that southern feel. You can hear this style of chord playing splattered all over southern rock from Marshal Tucker to Lynyrd Skynyrd - "Play it purty"