From uploader Mark McCracken:

It hit the back of my kayak twice and I turned around to see it. I couldn’t tell if he was biting [the kayak] or if he was head-butting it but soon as I saw it I just started going at him with the paddle.

It followed me all the way into about three feet of water. Even after I got out of my kayak and made it to the beach he was sitting right there… it was pretty creepy.

https://www.youtube.com/watch?t=2&v=1K5vcdfuj6s

Come on shark, take it easy dude. What did this guy ever do to you? Even after Mark smashed him in the face with his paddle 100 times the shark would just not go away. Maybe he enjoyed it? Maybe he’s so hungry he just didn’t care? Whatever the case that was probably the most determined shark I’ve ever seen. Just when Mark thought he’d sent him packing he’d just come back for more.

Just a good thing he hasn’t yet learnt how to jump out of the water, like these sharks have.