Watch the All In online guitar lesson by Bill Kirchen from 30 Hot Rod Guitar Licks You MUST Know

We're gonna be Cash's whole Tennessee Three here; Johnny on acoustic, Marshal slapping the dog house bass, and a deadpan Luther on tic-tac. It's a variation of the old boom-chuck Maybelle Carter lick, tweaked for electric with a pick on the damped low strings and a bare finger brush on the top, plus a hammer-on and an upstroke to fill out the rhythm. This is a very useful rhythm device for a wide variety of styles.