"...The danger is in your mind"

Yeah, right.

He's smiling like...."Oh look, lunch!"

They are awesome creatures,

"Oh look, lunch!"

he's smiling because he's thinking how good ur gonna taste....

People who study sharks and actually know something about their behavior all say that humans are not natural prey for sharks (we're too much trouble to eat under normal circumstances). Most attacks appear to be the result of either crowding (too many people in the water) or depletion of the local food supply. Incidents of attacks by other animals consistently outnumber shark attacks (except, of course, in movies).

I don't think that smile means what you think it means.