Did he drop his cigarette on his face in that last picture?

The diving reflex is both great and terrifying, depending on the context.

The interesting thing is that not even humans tend to be very loud if they're actually drowning, since all their energy and breath goes toward keeping themselves alive, like most animals. I think the loud splashing scene you'd probably expect (like movies like to portray) comes more from a panicking person than someone drowning, which could of course become a drowning hazard from tiring themselves out.