Muscadet that have been aged "sur lie" can have very subtle "yeasty" aromas. The beer used in a beer cake may impart a yeasty flavor to the cake. The end product is a bread like cake with a slight yeasty taste. This causes the finished wine to lack the fresh yeasty taste of the fino sherries. The characteristics of spoilage caused by "Z. bailli" are product separation and a "yeasty" odor. This comedy seems staler, less yeasty than, say, "Carry On Nurse".