Glen Drover, best known as a former lead guitarist for Megadeth, is an instructor on JamPlay, where he teaches live and pre-recorded lessons.
In this particular lesson, Drover shows you how to play a useful yet "mysterious" harmonic minor walk-down in the key of E.
This lick can be played by using alternate picking, or alternatively as a blazing-fast legato run.
Check out the lesson video below—which comes complete with tab and video.
For another JamPlay lesson, check out Andy James' "Three Pentatonic Hybrid-Picked Runs to Increase Speed and Dexterity."