As far as exit, I lived in a ground floor apt w/my ex-husband. I locked the bedroom door and climbed out the window because I wanted away from him.
As far as enter, I remember when I was a kid my parents somehow locked the keys in the house. They got a window open enough for me to climb through (because I was the smallest person) so that I could get in and unlock the door. It was a long time ago, but I remember it was during Christmas season because Rudolph was doing to be on TV that night.