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