3) Some wackhead White dewds in a dinghy decide that they are going to strike a blow for White Supremacy....awwwwww, I mean, "conservative freedom of speech" by simply taking over the dock where said city paddlewheeler is supposed to anchor.
4) Lone Black dock security guard catches this attempted robbery of city property and attempts to intervene by himself.
5) White dinghy riders take full exception to security guard doing his job, and promptly gang up and ambush him.