Most of this cartoon is top-notch Fleischer fare and definitely worth watching, but there's one part that makes it absolutely stand out: the darkly hypnotic scene where Koko the Clown sings an elegy in Cab Calloway's voice in the underworld while Betty Boop is marched down in her glass coffin by pallbearers. The first time I saw it, it was literally breathtaking; all conversation in the room stopped as soon as Calloway started singing, and we watched, hypnotized, as Koko turns into a skeleton and dances with Calloway's moves in Hell while skeleton fish fly through the air and skeleton humans play poker deep in the background. As good as cartoons get.
Review of Snow-White
