I live in a building where we don't have keys to the lobby door and have to wait for someone to buzz us in.
I seen that no one was at the desk. I checked the door to see if it happened to be unlocked,it wasn't.
I said I don't like this.
A woman who I don't even know how she saw me from where I was standing came and let me in then went to the elevators. Of course I thanked her.