"No one can complain of Clarence's lack of variety or versatility. When he really gets going he's a three-ring circus. During one number, he plays, sings, whistles a chorus, and snaps his fingers with the technique of a Spanish dancer to give further percussive accompaniment to his blues. At times he turns sideways, almost with his back to the piano as he keeps pounding away at the keyboard and stomping his feet, meanwhile continuing to sing and shout at his audience or his drummer. Suddenly in the middle of a number he jumps up, his hands clasped in front of him, and walks around the piano stool, and then, unexpectedly, out booms a vocal break in a bass voice from somewhere. One second later, he has turned and is back at the keyboard, both hands flying at lightning- like pace. His actions and facial expressions are as intensely dramatic and exciting as his music."〔(【引用サイトリンク】title=Boogie Woogie by William Russell )〕