I have locked my keys in a vehicle twice then started carrying a spare in my wallet. Second time was at work and a dodge minivan (yes I made the mistake of buying one of those), called AAA and they said it would be an hour so I took my leatherman and bent a coat hanger and fished it down the window seal and popped the lock in about 5 minutes.
First time was in my old 88 Chevy s10. I was working part time at night as a grocery bagger while in college. Went out after my shift ended at midnight and started my truck and turned on the defroster and got out to scrape the window and locked the door out of habbit with the engine running. Chevys are made better than dodges and you can't pop the lock as easily but mine had been a mud race truck and someone had popped the cover in the floor where the paint flows in when they dip the cab at the factory and I had covered the hole with duct tape and taped my spare keys there. So I crawled under and stuck my hand up between the frame and torsin bar and cut a slit in the duct tape with my little pocket knife and then poked my hand through a little too fast and heard the keys move away. I stretched as far as I could and was able to reach a key and opened the door and let myself in and drove home. When I got home I realized I had the spare ignition key in my hand (the door and ignition keys were different then) and I went back down to the parting lot and tried it in the door and it would not open the door this time.