In the same album that Peter Gabriel has one of the greatest songs ever written, Solsbury Hill, he also has this weird song called Moribund the Burgermeister (lyrics). Apparently the song is about a disease called chorea, which caused involuntary motions akin to a weird dance, during which people would pray to St Vitus for aid because it was believed the sufferers were possessed, thus it became known as St Vitus' Dance. Yowzers.