Part 3 of our track-by-track series with Gary Clark, Jr, young dog and bluesman on the come up, breaking down "Ain't Messin Around" from his forthcoming album Blak & Blu. Today's thought from GCJ: don't mess with him. If you've heard the full stream of the album we posted yesterday, you already knew. Don't mess with him but do fux with him and pre-order Blak & Blu on iTunes now.