It may not be quite as dramatic as Planet Earth II's famous iguana/snake chase of 2016, but this clip from the BBC's Planet Earth III is still undeniably unexpected.
The footage form the David Attenborough-narrated doc sees Great White sharks amassing off the coast of South Africa with the hope of snacking on some seals who need to enter the water to feed. But the tables quickly turn when the seals realise there's strength in numbers, and form a massive group to drive the shark away.
How come Sheriff Brody didn't think of trying that in Jaws?
