His right hand, flattened into the shape of a fin, glides slowly over the table, bobbing up and down as it moves.
Up. Down. Up. Down.
He remembers the haunting sight. Raheem Mostert was 16 years old then, sitting with one leg dangling off each side of his surfboard, waiting to catch another wave off the coast of New Smyrna Beach, Florida. And there it was, three feet away. A shark. Lurking. He had lived in the "Shark Attack Capital of the World" long enough to differentiate a shark's fin (pointy) from a dolphin's fin (round).