The last time I locked my keys in the car, was many years ago, and it's still funny.
The car was not running, but it was in front of the gas pump at the local BP station. Luckily, it was only 8 miles from home, and my husbnad was not working (he works at a BP refinery) I called him, and he came to rescue me, only saying 4 words "You're holding up profits"