>The patrolman, 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 patrolman was dumbfounded. "This equipment must be broken!" he exclaimed.
>
>"I doubt it," said the man, "Tonight I am the designated decoy!"

On the other hand there's a guy who had just enough brains left to pull over when signalled to, and blew 3.45. The cop almost faints, never seen that much, and shows the display to the guy:

cop: "Oh man... look at this! See the numbers?"

guy: "Oh, quarter to four... good, I'll be on the job on time."