They thought he was insane. And with good reason. Here was a man who'd spent his life in a machine shop coming down one morning to say in all apparent sincerity, "I've decided to be a concert pianist." Jan Grabowski, on the turret lathe grinned and said, "Sure, John. They'll bring in a grand piano and you can practice between cuts." "They laughed when I sat down to the piano," someone bellowed and there was general laughter and the thing was forgotten. But later, when he told the boss he was qui