Mike, that is a creeepy story... The most comforting line was "the water is f'ing beautiful. Blue...clear".
Most shark attacks occur in murky water, when the shark can't really see you too well. Unless we're talking about whitey... in his case, he eats when he wants regardless of who what where. I've only seen little 3-5 feet long leopard sharks here in socal, they get close and swim away. Dolphins have been really scary around here, especially when the have their youngens around...pheew weee...
RE: Your shark sighting....I had a smiliar experience as a kid... summer time, sitting on a longboard, trunking it, it's pretty flat out and the water is perfectly clear. I'm checking out chicks and day dreaming until I look down and see a huuuuge grey thing under me. I got really sketched out and get on my hands and knees (on top of my board). I don't see it for a few seconds and then it reappears. So now I'm thinking, "Next wave is my ticket in mother f-er." Well it was really flat that day and nothing came rolling in. So here am, on my board, on my hands and knees, with googly eyes focused on the water beneth me, when all of a sudden it hits me.... it's the *****in shadow of my board on the sand below.
I was still freaked out and paddled in on the next wave. Shieet, foiled by mother ocean again... hehe