sentence: There's a large team of participants getting ready to do engage in a water tubing activity. sentence:  They walk down a hilly terrain to the river. sentence:  They get onto their tubes and begin going down the rapids. sentence:  The participants seem very calm and happy as they wave to the camera. sentence:  They all begin their journey down the rapids as the water starts getting more turbulent. sentence:  They continue going along the with water current as they flow steadily through the water. sentence:  Then they all arrive at banks of the river where the water is calm and steady flowing.