'On my way to an emergency' my ass! One mofo gave me a ticket even though I him told my eyes had been operated on and that I was headed to the hospital due to haziness in vision. Of course, the fcker sped everything up and dished out the fastest citation in history - the entire drama was over in less than 5 minutes.
My friend uses just one sentence everytime he's pulled over - "my gf has gone into labor at xyz hospital/clinic". It has actually worked a couple of times.