I never buy a car now that I can lock without the key! That way I cant lock my keys in.
Worst story, I once locked my keys in the car in the ignition, with one of my babies sleeping away peacefully in his car seat!! I was hysterical, I dont know why, cos he slept through the WHOLE thing. After about half an hour a kindly soul 'jimmied' the door for me, rather worryingly easy, and I have never been so glad to squeeze my baby.
So moral of the story, now I cant physically lock my keys in my car as I need them in my hand to work the remote!
Poppy