In the 70s some of us were out running on the perimeter road of a base in Okinawa just after dark. We heard a whizzing sound, and smack! Some douche on a bicycle ran into one the guys (a Corporal) running. Broken nose, cut and scrapes everywhere. To the point, because of the scar tissue on his shins he couldn't lace up his boots. immediate medical discharge. Elapsed time was less than a month.