Add a second floor to your house. Do not add a stairway. Enable the move_objects on code. Wait for the paper girl, maid, mail girl, or gardener to arrive (or call the pizza man). Place him or her on the second floor. Do not let them go. Wait approx. one day. A circular tornado-looking object will appear around them, like when something is repossessed. Note: Unless you do not like the neighbor, do not attempt this on them. This trick does not work on them, and will kill them. It will be like placing a Sim in an empty room with no exit. Note: This does not work on the first floor.