So ... The shark is out with his young son teaching him how to hunt. They happen upon a shipwreck with a group of people foundering in the water.
Dad shark says listen up son, here's what we're gonna do. First we swim around them a few times with just the tip of our fin showing. Then we swim closer to them with our entire fin showing. Then we eat them. Son says ok Dad but why don't we just eat 'em now?
Dad says trust me son, they taste better if ya scare the crap out of em first ...