You might have sliced the head off a flopping fish, but could you kill an octopus by biting it between the eyes?
Survivalist Josh James, known as the Kiwi Bushman, demonstrated the gruesome technique during a diving trip and posted it on his YouTube channel.
The Kiwi version of Bear Grylls holds up the mollusc he has just caught, as its tentacles flay wildly around.
He then explains that they are "really good eating" but you have to freeze them to get the optimal texture before cooking.