the didgeridoo technique i dont think would work. i can play a didge albeit badly, but the air is coming from your lungs the trick is to fill your cheeks with enough air to keep the didge going while you quickly inhale through the nose. it helps if you have big nostrils to inhale as quickly as possible before the air in your cheeks runs out.
the lemon juice works.. i cant remember my high school biology too well but the acid in the lemon juice neutralises the alcohol on your breath. acid + alcohol = water + base i think.. something like that anyway. we were trying it in the pub on a mates breathtester and i was pulling a 2.0 and the lemon brought it down to a 0.03 or thereabouts. it wears off pretty quickly though so try not to let the officer see you ditching the lemon peel.
