How to Immediately Fail a Breathalyzer

5/11/2009 3:00 PM PDT BY TMZ STAFF
If you're trying to prove to a cop you're not drunk, taking a swig from the breathalyzer might not be the best way to do it.

Breathalyzer fail: Click to watch

As far as we know, the footage was shot recently in Serbia ... but no one here speaks Serbian ... so that's our best guess.