Watch the Behind the Nut Bends online guitar lesson by Joe Dalton from 50 Country Guitar Licks You MUST Know
Jerry Donahue does some great behind the nut bends, check out his work with the Hellecasters. This particular lick includes harmonics and is another one of the pedal steel imitation variety. Another great thing to do is to use volume swells with this lick. You may try a volume pedal. Sometimes I just use the volume control on the guitar.