Thielemans was also a fabulous whistler, expressive and exact, and could accompany himself on guitar, doubling the melody on his lips with his fingers on the strings. The tune itself is serpentine, and serves as a fitting declaration of respect and appreciation for Thielemans's chromatic Hohner harmonica. The quartet plays the line in unison first, then NHOP breaks apart from the conclave to provide independent bass counterpoint, striding vigorously into the opening solo taken by Thielemans.