Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Expensive, difficult, slightly dangerous, not particularly effective... I'm on a roll.

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breathalyser operated key locker

 if you are drunk you cant get your keys
 
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i envision a key locker that you put your keys into and then look into a retina scanner so it knows who you are. to get your keys back you;d have to look into the retina scanner and blow into the machine...
—bobenhotep, Jul 31 2004

this one locked you out too. I am sure there were others. http://www.halfbake...k_20to_20your_20car
[po, Oct 04 2004]

Breath Alcohol Tester controlling a car ignition system http://www.ee.washi...k2/final/ee498h.htm
[Ander, Oct 04 2004]

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