Boat 1 was being removed from the water.  The vessel was on the trailer and the owner was connecting the safety chain when boat 2 impacted the stern of boat 1.  The owner of boat 2 was approaching the dock.  The operator reached to his left to hold the dock and struck the gear shift on the floor with this right leg putting the boat into forward mode.  He held onto the dock causing him to be pulled out of the boat into the water.  His boat continued forward and collided with the rear of boat 1.
Sandpoint                     