Reminds me of a true story, which is not a joke as such. Certainly wasn't at the time. Many years ago my mother had an orange Mini automatic. Not many Mini automatics around. As with many cars those days, it had separate keys for door and ignition.

One day she parked it at an out-of-town supermarket. Later on she came out, headed for her orange Mini, opened the driver's door and put her shopping on the back seat, then put the ignition key in and started the engine, and drove home.

Once home she took her shopping off the back seat, then opened the boot (trunk) for some things she had bought earlier, but they weren't there. But there were some things she didn't recognise.

How likely is it that there were two orange automatic Minis taking exactly the same keys in the same car park that day? Because that turned out to be the explanation. When my mother called the police to say what had happened, she was told that the real owner of the car she had just driven home in had just reported it stolen.