February night in a secluded suburban neighborhood, a man sat down to eat at his dining room table. When suddenly, he heard a "POP, POP, POP" coming from somewhere nearby. The man dropped his fork on the plate and ran to the window at the front of his house, but everything outside looked completely normal and calm. Still, the man could not shake the feeling that something bad might have just happened. So he called the police and explained what happened, and they sent an officer out to investigate. But the officer saw the same thing the man had seen – everything looked normal and calm. So the police officer went back to the station, and the man finished his dinner