Ford planned a carefully staged Mustang debut for the 1964 New York World’s Fair — but two days before that unveiling, twenty-two-year-old school teacher Gail Wise walked into a Chicago-area dealership and drove one home anyway. It remains one of the most famous accidents in automotive launch history, turning an ordinary car purchase into the story of the very first Mustang ever sold. Here’s how it happened, straight from Hagerty.