A guy gets pulled over by police "Step out of the car" says the cop "I am going to need you to take a Breathalyzer test". "I can't" the guy says "I have very bad asthma - that could set off an attack". "Alright" says the cop "then you're going to have to take a blood test". "Can't do that either" Jim replies "I am a haemophiliac - if a wound is opened, I won't stop bleeding, and I could bleed to death". "Okay" the cop answers "then I will need a urine sample". "Sorry" says Jim "I also have diabetes - that could push my sugar count really low". "Fine, so just come on out, and walk a straight line for me". "Can't do that either" responds Jim. "Why not?" asked the cop. "Well, because I'm drunk you dick - I could go to jail!"