Classic G-run, a good place to start: G A A# B D E D G. Start on third fret, low E string, then play open A string, Hammer on 1st fret, then 2nd fret A string, open D string, second fret D string, pull-off to open D string, then open G string. This is a moveable run, and with a little transposition, is a big part of the framework of bluegrass guitar.