“A scream pierced the air, unintelligible, without words. Rocha spun to see a large shark thrashing beside his friend. He kicked off his flippers, ran through shin-deep water and dove into a wave. After a few strokes, he looked up and saw water around Medici tinted red with blood. Rocha was a strong swimmer. He had to cover 30 yards. He halved the distance and lifted his head again.” C.J. Chivers in NYT Mag: Fear on Cape Cod as Sharks Hunt Again.