Please choose the correct ending to complete the given sentence: River tubing: People are floating down a river in rafts. we

Ending1: then see people getting rafts at a building. Ending2: see pictures of people doing depth giving instructions. Ending3: see a series of images in slow motion. Ending4: see behind them a bunch of people bouncing on the front.

Answer format: ending1/ending2/ending3/ending4