Nice job on that simple but very effective idea, RR! I use this technique a lot.
As a follow-up, you might want to show a related lick (World's Shortest Lick, Vol. 2?) where you hold a note with your index finger on the B string and play the G string 2 frets higher, bending up a full step to reach the same note as on the B string. Great way to get a fat, wailing sound on a "single" note, with one string holding that note while the second bends up to it.