RedactedNarrative: Based on statements given on Sunday August 13, 2017 at approx 17:00 operator1 was operating a rented vessel on Watauga Lake in Carter County.  Operator1 was leaving Mallard Cove Marina where the vessel had been moored.  Passengers on Operator1''s had attempted to push the vessel clear of another vessel moored in front of their vessel.  Operator1 moved the throttle into forward and being unfamiliar with it''s operation, the vessel lurched forward. This sudden movement caused a female passenger that was standing on the bow of the vessel to be ejected into the lake.  The vessel also struck the vessel that was moored immediately in front of Operator1''s vessel.   Operator1''s vessel sustained no damage, only minimal paint transfer starboard corner of the bow.  V2 vessel sustained damage to the gunwale on the port stern.