I actually bought a breathalyzer a while back just so I would know when it's safe to drive again the next morning. It's surprising to see how high a number you'll blow the next morning after a boozy binge. Unfortunately, me and a friend of mine broke the machine because we spent an evening trying to see how high we could get the number. I know we reached the level where your symptoms should be: Coma/Death. Now it just gives me an error message.