Many years ago my wife had driven my '36 Ford coupe to a local shopping center, she had taken the coupe because it was out in the driveway and she did not want to move it so she could get her car out of the garage.
About an hour after she left I got a phone call that she had locked herself out of the car, which reputedly is impossible. I arrived at the shopping center to find a crowd gathered around the car, several men were doing their best to help the lady get into her car.. they had tried "slim jims" coat hangers and forcing the handles to no avail. One man had gotten a tire wrench out of his car and was going to break a window.. My wife stopped him because she knew that all of the glass in the car is original '36 Ford glass that came in the car when it was new.
I could not figure out how she had locked herself out of the car.. She told me that she had reached across and locked the right door by pulling the handle up, she then exited the car pulling the left door handle up and closed the left door.. Normally the handle would have returned to the unlocked position when the door was closed, for some unknown reason this did not happen.
I sized up the situation, I could not get into the car via the trunk because the deck lid is operated remotely using '41 Ford conv top lift motors.. breaking a window was not an option... My car is a late 9/36 car, all of the window codes run from 6-36 to 9-36.
I had one option, I got a pair of pliers from my truck, being quite thin at the time I wiggled under the car, using the pliers I removed the two 1/4-20 screws holding the battery box cover.. I had relocated the battery to the trunk area many years earlier to allow room for the brake master cylinder.. Carefully pushing the battery cover up gave me enough room to use a coat hanger to pull the handle down and thereby unlock the door. I knew the cover screws would be easy to remove because I had to remove the cover periodically to check the fluid in the master cylinder.
Problem solved, I left the pickup for my wife and took "Henry" home.