This from "waveriderhun" on Oceans Below's YouTube underwater video channel:

Now that's a reality check, thank you for the video!
When I did my daily trips to Shark Bay every day to freedive among the blacktips, I had NO idea the surrounding seas harbour bullsharks as well.. :(

Next time I'll get some company before swimming out on 20 minutes distance from the shore.. A knife is not much help against the bullsharks.

Great video! :)