This was told to us as a true story, but it may be just a really funny urban legend.
An elderly Florida lady did her shopping and, upon returning to her car, found four men leaving with her car. She dropped her shopping bags, drew her handgun and screamed at the top of her voice, "I have a gun and I know how to use it! Get out of the car, you scum bags!"
The four men didn't wait for a second invitation. They got out and ran like mad, whereupon the lady, somewhat shaken, proceeded to load her shopping bags into the back of the car and climb into the driver's seat.
She was so shaken that she could not get her key into the ignition. She tried and tried before it dawned on her why it wouldn't fit. A few minutes later she found her own car parked four or five spaces farther down.
She then loaded her bags into her car and drove to the police station. The sergeant to whom she told the story nearly tore himself in two with laughter. He pointed to the other end of the counter, where four pale white males were reporting a car jacking by a mad elderly woman described as white, less than 5' tall, glasses, and curly white hair carrying a large handgun.
No charges were filed.