RedactedNarrative: Motorboat was attempting to beach on shore of lake island within a cove where boats routinely park to publicly gather.  Victim standing on the shore attempted to assist docking motorboat by placing his hand upon the point of the bow - the victim thought he could slow the vessel before it struck a tree on the water's edge.  The bow of the boat crushed the victim's hand between the boat's bow and the tree trunk.  The victim sustained major injury to his right hand.  The motorboat operator did not stop to render aid and fled the scene before any one onshore could obtain the boat numbers from the boat.