"Mock Earthquake" joke
A troop of Boy Scouts was being used as "Guinea pigs" in a test of emergency systems.
A mock earthquake was staged, and the Scouts impersonated wounded persons who were to be picked up and cared for by the emergency units.
One Scout was supposed to lie on the ground and await his rescuers, but the first-aid people got behind schedule, and the Scout lay "wounded" for several hours.
When the first-aid squad arrived where the casualty was supposed to be, they found nothing but this brief note: "Have bled to death and gone home."
Q: Did you hear about the Mexico City earthquake? A: It did $100 million worth of improvements.