sentence: We see a person jet skiing. sentence:  We see a red and black sail on a surfboard. sentence:  We then see a yellow and blue sail. sentence:  A yellow one passes a black one and keeps going, then the yellow one turns around. sentence:  A yellowish green one appears on the screen. sentence:  Three pass a red and blue one going in opposite directions. sentence:  The rider of the red and blue one falls off his board.