Watch the Boulevard: Tag Ending online guitar lesson by John Knowles, C.G.P. from Fingerstyle Journals
The ending of "Boulevard" is based on a lick I couldn't figure out by listening to Chet's records. I had to get him to show me how he was doing it. He had a way of playing fast scales with a backwards roll: thumb, middle, index. Then with his left hand, he would fret three notes on each string. When you synchronize your hands, you can zip right up the scale. Thank you, Chet.