sentence: A group of rocks are shown washed up against the banks of a large blue river. sentence: The camera continues to span the river and a mountain range is shown. sentence: Another angle is shown and a small circle appears on the screen. sentence: Two hikers wearing backpacks are visible and show a rope. sentence: One man then gets in the water and tightens the ropes around a tree from one side of the water to another and sits on the rope. sentence: The man then stands up and attempts to tight rope across the water but falls into the water.