But he has keys with him, so he's by definition not locked out. Maybe I'm reading into it too much.

My door locks automatically when its closed - so when if I were to forget my keys, I would get locked out (which has happened, which is why I always carry my keys).

Look, I'm not advocating illegal lock-picking here, not at all. But you may want to take a look here: http://www.artofmanliness.com/2014/11/19/how-to-pick-a-lock-...