Re: New York Ferry
Could also have been a large wake hit him just as he arrived close to the dock.
New York harbor is famous for 'tsunami type' wakes from especially all the smaller 'fast' catamaran hulled ferry boats crossing and crisscrossing one another; when these boats come off a plane or semi plane ... all hell can break loose.
Its not all that unusual for a NY harbor fast ferry boat to occasionally get 'slammed' up against a dock because of the wakes. Usually they 'front load' off the bow and with the engines engaged to 'keep tight' against the dock. This particular boat usually docks along its side.