Drunk

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 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."

"Alright 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."