RedactedNarrative: V1 WAS BEING DRIVEN WHILE TOWING 2 INDIVIDUALS ON KNEE BOARDS, INDIVIDUAL 2(THE VICTIM) FELL OFF THE KNEE BOARD BUT FAILED TO IMMEDIATELY LET GO OF THE TOWROPE.  THE KNEE BOARD, BEING STRAPPED TO THE VICTIM, STRUCK THE VICTIM IN THE SIDE WHILE BEING DRAGGED BY V1.  THE IMPACT BETWEEN THE VICTIM AND THE KNEE BOARD APPARENTLY CAUSED INTERNAL DAMAGE TO HER KIDNEY.