RedactedNarrative: Operator of vessel #1 was in the process of mooring his boat when he accidentally applied too much throttle and struck 4 moored vessels.  A dock worker witnessed the accident as he was on hand to assist operator with dock lines as he moored his vessel. Operator attempted to moor his vessel bow in to his slip. It appeared that he turned too late and ended up perpendicular to his slip. At this time his port side and port quarter struck vessel #2's starboard outboard and the lower skeg was broken off. This outboard which was tilted out of the water rubbed down the side of the port side of vessel #1 leaving gouges in the fiberglass. He applied throttle in reverse and struck vessel #5 that was moored adjacent to the main dock. The stern of the of vessel #1 struck vessel #5 and left gouges on the port side and broke a wooden support in the inside of the vessel below the gunwale. He then applied throttle in a forward direction again missing his slip and drove the bow of his vessel up onto the twin outboard engine and port quarter of vessel #4. Vessel #4 sustained heavy gouging, paint transfer and scratches of the port quarter of this vessel and damage to both engine covers. Vessel #1 then drifted off vessel #4 and applied forward throttle again and struck vessel #2 in the bow and trailer eye bolt area. Dock hand then was able to assist operator in mooring his vessel safely without any further damage.