Home Alone

As I remember the story, a guy had a pool in his backyard, and on most days he would return home from work to find that the water level in his pool was significantly lower than when he had left in the morning. After eliminating the possibility that his pool had a leak, he decided there could only have been one cause.

Convinced that someone was using his pool during the day, he set up a video camera to catch the culprits. This is what he saw.