It’s only a joke, and it’s one I’ve made myself in the past. It usually begins with someone discussing composers and Philip Glass being brought up. At which point the wittier (not) among us go, “Philip Glass, Philip Glass, Philip Glass, Philip Glass, Philip Glass…etc…” The problem with this is that it would be far more accurate to make this joke in discussions of La Monte Young. So, if you’re considering making this joke about poor Mr. Glass, restrain yourself and only make it when Mr. Young is brought up. Classical music geeks will appreciate the accuracy more. In fact, if you do this, you’ll be performing one of La Monte’s own pieces (granted you annoy your friends and carry on the joke for a while):
Arabic Numeral (Any Integer) to H.F. (April 1960), popularly known as X for Henry Flynt, requires the performer to repeat a loud, heavy sound every one to two seconds as uniformly and as regularly as possible for a long period of time.
Ok, so it’s not exact, but nor is the other joke (Harrumph!).