The Local Sheriff of any town waited outside a popular biker bar, hoping for a bust. At closing time as bikers started to leave, he thought he spotted his potential quarry. The man was so obviously inebriated that he could barely walk. He stumbled around the parking lot for a few minutes, looking for his motorcycle. After trying his keys on five other bikes, he finally found his own bike. He sat on his motorcycle for a good ten minutes, as the other patrons left. He turned his lights on, then off, and again on and off. He started his engine and pull forward into the grass, then stopped.
Finally, he pulled out onto the road and started to ride away. The Sheriff, waiting for this, turned on his lights and pulled the man over. He administered the breathalyzer test, and to his great surprise, the man blew a 0.00. The Sheriff was mystified. “This equipment must be broken!” he exclaimed. “I doubt it,” said the man, “You see, tonight I am the designated decoy… I haven’t had a drink all day!”