If you get pulled over while driving, the officer may suspect you of being under the influence. This could be for the way you were driving, or because when approached, you smelled like booze-burps or slurred your speech. You may then be asked to submit to a field sobriety test. The NHTSA has helped to develop three standard tests to be used in the field.
Many departments and offices adopt additional tests to assist officers in assessing impairment. Popular tests include 'touch your nose', 'say the alphabet', and 'say the alphabet backwards'.
Here are some videos of field sobriety tests that didn't go so well ...
Even when you are red-eyed, stinking drunk with an unusually stupid excuse for swerving, an officer will still test you. You can count on it.
It can be so confusing!
but it certainly looks conclusive!
It's the Mother of All Sobriety Tests! This video, while a bit long, is simply too amazing for words.
A textbook HGN fail. Notice how her head (which the officer protected from hitting the ground several times) moves from side to side as she tries to follow the pen.