[logfromblammo]

Disclaimer: I am not a lawyer. This is Internet-tough-guy advice, and you probably shouldn't follow it. It serves mainly as a thought experiment for people who generally don't get pulled over by cops.

Don't refuse the test. Refuse to submit to searches, seizures, or interrogations without the assistance of legal counsel instead. Then sit down and shut up. You will be arrested, and taken to the cop shop, but you will be more likely to prevail in court after you get your administrative punishment at the police station.

There are no objective standards for passing a field sobriety test. They exist solely to give officers plausible justification for whatever they decide to do next. If they give you one, they probably haven't yet decided whether to arrest you. In that case, if you do well enough, you will probably be free to go. If they have already decided to arrest you, you could juggle flaming chainsaws on a unicycle and still fail the test.

Once the cops even hint that they may be building a DUI case against you, stop helping them do it!