We went to the beach, and Daniel hung out past the breakers, his goal was to be the furthest out blob on the horizon. I tried to persuade him to come in closer, by pointing out that the predators pick off the ones on the edge of the herd, but did he listen? Nooooooo!!!
After he'd been out there a couple hours two dolphins swam by and got within 10 m of him. At first he thought they were sharks. Did he come in? Noooooo!!!
So I think it was accidentally on porpoise...