Vessel 1 was tied to the dock; the Operator of Vessel 2 was attempting to dock Vessel 2 in proximity to Vessel 1.  While attempting to dock, the Operator of Vessel 2 reported that his throttle control became "loose", and when he put Vessel 2 into reverse, Vessel 2 actually lunged forward at full throttle.  As a result, Vessel 2 collided with Vessel 1 and came to rest on the shore.
Thornport