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1. A blood alcohol calculator adds to the countless number of completely useless iPhone applications. If you're worried about drunk driving and want to calculate your BAC on the spot in order to avoid potential death and destruction- there's an app for that. Using your iPhone camera, grab a friend and have them take a picture of your eyeball to see if it shows signs of HGN, an involuntary eye movement that can occur when completely wasted. The only problem is its accuracy. Here's an idea: if you ever find yourself in this situation, just hop in a cab. [Gothamist]
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