Charles Bluster succeeded in causing the worst auto accident possible.
(at least for a man).  

On May 22, 2006, Ralph Bluster was pulling out of his girlfriends
driveway when he drove over his own penis, tearing it off at it's
base, along with his testicles.  Bluster was unconscious when
authorities arrived on the scene, and was immediately taken to St.
Lukes hospital where he is presently in critical condition.

Officer John Bailey was the first officer to arrive on the scene when
he spotted Bluster's car halfway in the road, not running, and the
driver's door was ajar.  He said he suspected something was awry and
approached the car.  Bluster was slumped over the steering wheel and
unconscious.  That's whe he noticed there was blood on the floor of
the vehicle and saw the severed penis on the pavement.  Shaking his
head, he commented "I can not understand how this accident occurred,
there is just no logical explanation"  The penis had indeed been run
over, and matching tire tread proved, Bluster actually drove his car
over his own penis.  Police are investigating the incident for
possible foul play.  Surgeons were unable to save or re-attach the
dismembered organ.

Robert Mueller reporting