sentence: A group of people transport a boat on their heads. sentence:  People jumps backwards on the river and floats on their backs. sentence:  Then, people in a boat raft down the choppy waters of a river while paddling. sentence:  People in two boats meet and start to throw water each other using the oars, then some rafters jump into the water. sentence:  Persons jump from a balcony on the rocks to the water while other people continues rafting.