In a foul mood? Watch this “Jazzercise” video, starring the spirited Judi Sheppard Misset and her band of merry back-up dancers and move your boogie body. But a YouTube commenter issues this warning: “What has been seen, cannot be unseen.” But don't hate me for having a laugh at Judi's performance. She's credited with creating the whole Jazzercise craze and in 2008, her company's revenues topped $93 million. Move your boogie body, indeed!