Apocryphal strategy at a Tennessee bar

Email from my cousin:

Paris, Tennessee.

After last call the officer noticed a man leaving the bar so intoxicated that he could barely walk. The man stumbled around the parking lot.

After what seemed an eternity in which he tried his keys on five different vehicles, the man managed to find his car and fall into it. He sat there for a few minutes as a number of other patrons left the bar and drove off.

Finally he started the car, switched the wipers on and off. Then flicked the blinkers on and off a couple of times, honked the horn, and then switched on the lights.

He moved the vehicle forward a few inches, reversed a little and then
remained still for a few more minutes as some more of the other patrons' vehicles left. At last, when his was the only car left in the parking lot, he pulled out and drove slowly down the road.

The police officer, having waited patiently all this time, now put on the flashing lights, pulled the man over, and administered a breathalyzer test. To his amazement, the breathalyzer indicated no evidence that the man had consumed any alcohol at all!

Dumbfounded, the officer said, "This breathalyzer equipment must be broken."

"I doubt it," said the truly proud Hillbilly. "Tonight I'm the designated decoy."