There is absolutely no way it was a fourteen foot shark IMO. Sub ten foot I would guess based on the size of the dorsal and the tail and the distance between. It was a juvenile or sub adult great white, certainly under the 3.5m mark for a mature shark. It came in, checked him out, and got caught in his tail rope. White sharks are ambush hunters, watch how it just lazily pops up and then thrashes when it gets caught. It's just cruising, wants to know wtf Mick is and gets startled when it feels the tail rope.
A white shark attacks with a powerful charge from below, takes a huge bite out of the prey, and then waits around while it bleeds to death. Even if this was a curiosity "attack" or test bite, he would have lost a limb and probably died. They like to chew on something they don't understand. Behaviour wise, this is just a "bump" where the shark got a but more than it bargained for. Bumps can be territorial, or they can be a precursor to an investigative bite, or just a tactile response to something that gives off an unfamiliar electronic impulse. It certainly doesn't circle back, it shakes it's head to get free and it's off. If anything, by hitting it he probably made it seem like it was going to come again, because it would have thought it was still caught up and shaken again.
It would have been a reasonably pants shitting moment and any encounter with any kind of predator is potentially dangerous, but calling it an attack is why people develop the wrong idea about sharks and it really, really shits the marine biologist side of me
