"How to avoid drunk driving tests" joke

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.''