Watch the Stoned C online guitar lesson by Robbie Calvo from 50 R&B Licks You MUST Know
This is a classic minor pentatonic lick utilizing double stop ideas from within the C minor pentatonic scale at the 8th fret.
I end the lick with a nice major 6th chromatic double stop idea from the 7th down to the fifth fret. The two resulting resolution tones are both chord tones of the C7 chord. G, the 5th and E, the major 3rd.