For those of you with guns, do be careful who you shoot. Several years ago, my neighbor and I lived in second story condos. We each had a private front door and an open stairway leading up to our units. You could look down to see who was coming in your door.
So, after midnight one evening, one of my neighbors heard the front door open and close, but no one come up the stairs. She got up to see what was going on, peeked down the stairs, and saw an elderly man taking off his shoes and pants just inside her door. He was sitting on one of the steps, struggling to remove his shoes. She called the police and it turned out she had left her door unlocked and an elderly man with Alzheimer's had wandered off and thought he was home. His wife was very happy to get him back.