Our bathroom is in the back of the house and it's difficult to hear if someone is on the property to conduct inspections, maintenance or even to visit.
One morning while getting ready for work, and thinking I was the only one at home, I kept hearing something crawl around under my bathroom floor. Thinking that somehow the neighbor's cat had gotten under the house, I began stomping the floor hard and shouting at the top of my lungs, "Get out of there!" and "Stop that!"
Finally, the moving stopped so I finished getting ready and left for work.