Tim Buckley did it three times. First with Blue Afternoon (where he went from being a winsome Romantic folkie into a modal chamber jazz folk thing), followed not too long after by Starsailor (which is full-on Free Jazz) and then again with Look At The Fool (which is kind of the nadir of his three Boz Scaggs album - and I am not adverse to a bit of that). An education in how to clutch commercial defeat from the jaws of artistic victory in nine hard lessons.