A supervisory aerospace engineer had been retired three months before he visited his old workplace. He wandered into one office and found a draftsman laboring earnestly. He hardly looked up the whole time he chatted with the retiree. Sensing that he was interrupting an important project, the engineer was about to excuse himself when the draftsman threw down his instruments and sat back. "For Pete's sake," he said, "it's just dawned on me that I no longer have to look busy when you appear."