This slow blues waltz is consisted by not a simplechord progress. (see
MB solo starts mainly under the typical blue note scale tasting wild 'Texas
Gradually, MB heaps up the sole with his favorite fast altissimo phrases.
On 17bar, a beautiful bent-up explodes : altissimo A->C (on Bb; B->D)
G(A) just beore A(B) is clearly heard, so I guess bending note is made
by the fingering of altisimo C(D).
Anyway, a cool phrase.