A policeman pulls a driver over for swerving in and out of lanes on the highway. He tells the guy to blow into a breathalyzer. "I can't do that, officer -- I'm an asthmatic. I could hae an asthma attack if I blow into that tube." "OK, we'll just get a urine sample down at the station." "Can't do that either, officer. I'm a diabetic. I could get low blood sugar if I pee in a cup." "Alright, we could get a blood sample." "Can't do that either, officer. I'm a hemophiliac. If I give blood, I could die." "Fine then, just walk this white line." "Can't do that either, officer." "Why not?" "Because I'm drunk."