A police officer pulls over this guy who had 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 breathalyser tube for me."

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 accompany me 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'll take 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."

"Alright, then I need you to come out here and walk along this white line."

"I'm sorry, officer, but I definitely cannot do that."

"Why not?"

"Because I'm drunk."