RedactedNarrative: Two men were having some mechanical issues on vessel #1 and were being towed up the Crane River by Tow Boat US.  While the operator of tow boat was waiting for a bridge opening passenger was assisting in shortening up the towline.  
  
  Injured was waving to some friend on the river when tow boat shifted into forward he lost his balance and fell toward the back of the boat.