Please choose the correct ending to complete the given sentence: River tubing: A heavy water flow is seen followed by a person riding down on a tube. several shots

Ending1: are shown of people riding in tubes down a rough river. Ending2: of landscapes are then shown as the tube picks up more water. Ending3: are then shown of a river with numerous people riding down in tubes along the way and people jumping down and along. Ending4: of the water are shown as well as people walking up and down it and riding.

Answer format: ending1/ending2/ending3/ending4