From: Jim Ertner [ertner@psnsbsn.navy.mil] and was posted on the groaners listserv.

I, too, once had a friend, Joe, who worked in the coal mines. Unfortunately, he was killed in a freak accident when some movers lost their grip on a grand piano they were transporting; the piano fell down the mine shaft and crushed Joe to death. A local composer wrote an orchestral piece in memory of Joe: It was called “Symphony in A Flat Miner.”