Originally Posted by The Batlord

Speaking of Christopher Nolan, I was just watching Batman Begins, and I'm vaguely sure that when he hits those three keys on his piano to open the Batcave, he plays a tri-tone. It also kind of sounds like it might be the riff from "Black Sabbath", which might make sense, since the lyrics could definitely be made to suggest Batman. Would anyone who actually has an ear for this kind of thing care to comment?