sentence: A man water ski pulled by a boat, then the driver of the boat gives thump up while a woman watch him. sentence:  The man holds a sandwich with his right hand and the rope with the left hand. sentence:  Then, the man free the rope and takes from his behind a cup, after the rope seems floating in the air. sentence:  The man continues water skiing in the river. sentence:  Suddenly, a person comes water skiing and hit the man who hit back in his face, and the person falls in the water.