Three notes walk into a bar -- a G, an E flat, and a C. The
bartender looks up and says "We don't serve minors." So the E
flat leaves and the other two have a fifth between them. After
a few drinks, the G was out flat, and the experience was
diminished. Eventually, the C sobers up, sees one of his friends
missing, the other one passed out, and realizes to his horror that
he's under a rest.