When I was in high school, I went out on a very cold day to start my car and let it warm up while I got ready for school*. I started the car, but it was so cold that the door mechanism was frozen and the door wouldn't latch. I figured that if I locked it, it might latch upon closing. And since it was one of those locks where you had to hold the handle for it to stay locked upon closing, I didn't think it was a problem. Upon closing, it did stay closed, but it also stayed locked. Having a spare key, I went inside to finish getting ready.
When I came out, I put the spare key in the door and