He also played the sax on T-Rex's Bang A Gong
edit: Oops. I should have referenced some King Crimson as well. It starts rocking at about 5:30 if that is what you are looking for. For anyone that is wondering Tony Levin is playing what is called a Chapman Stick, it kind of a bass and a guitar on one fret board.
If you're going to make a post about Ian McDonald, why not reference some King Crimson that he actually played on?