Glen corralled the rope a second time, again bending his knees to illustrate the correct posture. The next guest also ignored him completely. The kid swung, but his thin arms didn’t have the strength to hold on. He fell straight down. A girl let go almost as soon as she clenched the rope, falling into the water with the grace of a cinder block. I winced. The crowd roared. Glen used the pole to drag people back to shore. Emerging, they seemed to be shivering violently. “The water is from the mountaintop lake,” Julie said. “It’s fifty degrees.”