My partner once let our then toddler son have my car keys, hers were in her handbag in the car. Anyway I'd only let her have my keys to open the car mid pack up after a summer camping holiday. Our son then toddled into the back of the car, dropped the car keys, climbed through to the front, pressed the lock button and climbed out again. Not knowing this I closed the doors so I could get past them with something. Without even thinking the doors would then automatically lock.
OK it was now 10am on Sunday and at had to drive home for 3 hours then unpack and get ready for work the next day. Called recovery company, one day left on that, only to find out they wouldn't help. Not even for a huge fee! Needless to say I had a good question along the lines of why give our only keys outside the car to our toddler to lose? That didn't go down well and it was now my fault!
BTW being the back end of nowhere in Wales we got no phone signal so had to use the campsite owners phone. Anyway the campsite owner got told our story, in between laughing and admitted that happened to them once, he called a mate at the local garage. He came put and levered the drivers door open enough to put an air bag in the corner which he pumped up enough to poke a metal pole through to press the door unlock button. He then took £30 off us for 5 minutes work!
Now I have my keys and nobody gets them off me. It's never happened since!