"The Babysitter and the Man Upstairs" is a popular urban legend about a young babysitter who is watching children in a house. She receives a series of unsettling phone calls from a mysterious man, who asks her to check on the children. As the calls continue, she becomes increasingly frightened and eventually contacts the police for help. The twist reveals that the calls are coming from inside the house. The police inform her that the man is already inside, leading to a tense and frightening climax. This story plays on themes of safety, trust, and the vulnerability of being alone.