After a long drive to the race track, I pulled in and stopped my truck in front of the mens room to pee. I left the truck running because I was only going to be in there for a minute, I jumped out and shut the door. When I came out and tried to open my door, it was locked. So, I opened my wallet and pulled out my spare key and then remembered it was the key for my Dakota. Doh! Then I came to my senses and remembered that on my Ram I hid the spare key inside the rear bumper. Whew!
After thinking about how i locked the door, I realized that when it's windy and I get out my right forearm goes against the door panel to hold the door open and I can easily push the door lock down.