To make the biggest noise when plunging a bomb into water, the secret seems to be to use the Manu technique practiced by the Maoris of New Zealand. This involves bending so that your torso and legs form a V when you fall and making sure your butt hits the water first.
The origins of Manu, meaning bird in Maori, are unclear, but jumping from bridges, docks, rocks and diving platforms, in an attempt to produce the biggest splash possible, has…