A violinist noticed at the end of each rehearsal break, one of the cellists would look at the inside flap of his jacket before he sat down to resume rehearsal. This continued for several decades, and the violinist became quite curious about it. One day, during hot weather, the cellist took off his jacket and went off on break. The violinist waited until everyone was off the platform, looked around, and sneaked over to the jacket. He pulled back the flap and saw a little note pinned on the inside. It read: "Cello left hand, bow right."
yeah I looked it up. who knows if it's original or not.