Grandmother 1, Shark 0
The rules of snorkeling safety are clear, but here’s a tip you might want to pencil into the rule book: if you’re getting attacked by a shark when snorkeling, beat the crap out it! That’s what this grandmother did, as she fought off a shark attack by “punching it on the nose, punching, punching…” according the the BBC.
Of course, you’re better off avoiding contact with sharks, if you can help it.