In 1976, 17-time world champion fin swimmer Shavarsh Karapetyan dived into a freezing, sewage-filled reservoir in Yerevan after a trolleybus crashed to the bottom. Zero visibility, lacerated legs, dozens of dives — he pulled out 37 people, 20 survived. The rescue destroyed his lungs and ended his career. He was haunted for years by the one time he grabbed a seat cushion instead of a person.