The person being interviewed on the quirky NPR radio program This American Life told a story that happened to him many years back. He had been walking with his wife in New York City when he saw Jackie Kennedy across the street waving at him. Since he did not know her, he looked around to see if she was waving at someone behind him but there was no one there. Not wanting to snub a former first lady, he waved back genially just before a taxi halted before her and he realized that she had merely been hailing a cab.
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