Breathalyzer

A guy is swerving down the road and gets pulled over.
The cop says, "You have to take a Breathalyzer test." The guy says, "I can't. I have asthma, and it'll start me on a coughing fit."

The cop says, "Then I have to give you a blood test." The guy says, "You can't.  I'm a hemophiliac, and if you prick me, I'll bleed all over the place."

The cops says, "Then you have to get out of the car and walk a straight line."

The guy says, "I can't."

The cop says, "Why not?"

The guy says, "Because I'm drunk. Didn't you see the way I was driving, you azzhole?"