People sail in canoes rowing with a paddle in a choppy river.  Two men in a canoe sail near the bank of the river, but then sail in the river.  The men spins the canoe an pass near an arch of the canoe course.  The two men cross a person alone in a canoe.  The men continue sailing down the river passing between arches.  Men in a canoes are on the border of the river.  After, continue sailing straight in the river.