Along the left margin the title of the photo is called “Stopping the Action.” The description of the photo from Life Magazine is:
This picture of a boatload of vacationers about to get a dunking in the Colorado River perfectly illustrates a few of the problems and rewards of action photography. At least four photographers are watching the sudden drama. But one (extreme left) is reacting too slowly to get a good shot. Another (left of boat) is so involved in the event that he has forgotten his camera. A third (behind the boat) has started shooting but is unluckily in the wrong positions and can see only the underside of the raft. Only the fourth, Kenneth Klementis, who took this picture, had the combination of good luck, reflexes and skill that produces the exciting action photography we show on these pages.