ago locked his bedroom door and he has the only key and it was imagined to be inside. He tried everything he knew and I knew. Credit card didn't work. He ended up having to whack off the door nob with a sledge hammer. Luckily, we had another new one out in the garage, but it wasn't fun to do. He had to do some cosmetic doorway repair as well, but thankfully he knows how to do that.