Life Imitates Joke I remember hearing a joke years ago that went something like this: A guy who juggles knives in the circus gets pulled over by the police. The police are concerned that the guy has all of these weapons sitting on the passenger's seat. The guy assures the officer that the knives are not for any nefarious purpose -- they are for work. To prove to the officer that the knives are work-related, he convinces the officer by juggling them outside the car. A person in a passing car turns to her friend and says, "Wow. Those field tests for drunk driving are getting really tough!"