RedactedNarrative: On 07-27-2019 at approximately 0930 hours, operator was attempting to dock his 2006 cobalt at his slip at silver beach marina. According to him and other dock attendants who have had experience with the boat, the cobalt occasionally throttles while in idle. As operator1 pulled into the slip, the boat throttled into the slip and jumped over the dock onto the opposing slip and on top of a cobalt boat.