Afa leaped form one side of the canoe to the other. In sudden anger Mako leaned forward to grab his little dog and shake him soundly. Afa wriggled out of his grasp, and the shift in weight tipped the canoe to one side. In another second they would be overboard. Mako threw his weight over quickly to balance the canoe, but with a loud splash Afa fell in to dark water.