Car doors DO work that way, Ted. As I said, look at the doorlatch on the back of your door when you open it. The two latches are held open until you close the door. Then they release and clamp around the post on the frame. (Take a screwdriver and slide it in there and watch them pop shut) Just like when you hold the lever over on a shotgun. They have made car doors this way for decades. Why? To reduce the wear of opening AND closing the latch when you open the door. It saves one cycle each time and saves wearing out the door latch. Guess what? The least amount of times you rub two pieces of metal together, the less wear you put on them. Doesn't take a rocket scientist to figure that out. You might want to tell your buddies that when you see them.