Had to call up a company and their hold music was Metallica’s Enter Sandman. I liked that. Got all the way to the final chorus before I got to the person I needed to talk to. What I find pretty interesting is that the wait time was briefly interrupted by someone picking up, but when they put me back on hold the music picked up where it left off instead of starting from the beginning.
MOH is typically multicast, meaning it plays one track to all callers at once. You locked out in that the company you called hasn’t been sued by that band yet.