A guy gets pulled over by the 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 can 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 hemophiliac, 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."
"I can't do that either," responds Jim. "Why not?" asks the cop.
"Well, because I'm completely drunk! I could go to jail!"