A police officer pulls over this guy who's been weaving in and out of the lanes. He goes up to the guy's window and says, "Sir, I need you to blow into this breathalyzer tube."

The man says, "Sorry, officer, I can't do that. I am an asthmatic. If I do that, I'll have a really bad asthma attack."

"Okay, fine. I need you to come down to the station to give a blood sample."
I can't do that either. I am a hemophiliac. If I do that, I'll bleed to death."
"Well, then, we need a urine sample."

"I'm sorry, officer, I can't do that either. I am also a diabetic. If I do that, I'll get really low blood sugar."
"All right, then I need you to come out here and walk this white line."
"I can't do that, officer."

"Why not?"
"Because I'm drunk."

The guy gave up easily claiming that he is drunk..