sentence: We see a swiftly-moving, white water stream. sentence:   A man in blue rafting equipment and a helmet is watching from a bed of rocks. sentence:  We notice a man in a kayak and a yellow helmet coming in from the left. sentence:   As he approaches, his kayak flips upside-down. sentence:  As the view follows him, we notice another man seated on the rocks to the right in red with a white helmet.