RedactedNarrative: On the evening of 07-18-2014 at about 8:45pm, operator A pulled into a dock with vessel A to drop off two passengers. The dock was on the port side as he did this. As Operator A backed away from the dock a wake caused his vessel to hit the dock with the Port/Stern of the craft. Operator A reacted to this collision by shifting the throttle into forward.  When he did this his vessel leaped forward faster than he expected and drove head on into the Port/Stern corner of vessel B that was tied up to another dock. Operator A stated that he had just bought the boat and was not used to the throttle.