PASSENGER FRONT WINDOW AUTO UP BROKE AND ALMOST COMPLETELY SEVERED A ADULT MALES RING FING TIP. IN A PARKING LOT THE WINDOW WENT UP 'USING AUTO UP'. A FRIEND WAS GETTING IN THE TRUCK AND HAD HIS FINGER UNFORTUNATELY IN THE WAY THE WINDOW DID NOT STOP AFTER COMING INTO CONTACT WITH HIS FINGER AND IT WAS ALMOST COMPLETELY SEVERED AT THE TIP.