How deep into a river or a lake would a person need to dive to evade any bullets that were fired at them?

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Hiding underwater can stop bullets from hitting you. Partly confirmed All supersonic bullets (up to .50-caliber) disintegrated in less than 3 feet (90 cm) of water, but slower velocity bullets, like pistol rounds, need up to 8 feet (2.4 metres) of water to slow to non-lethal speeds. Shotgun slugs require even more depth (the exact depth couldn’t be determined because their one test broke the rig). However, as most water-bound shots are fired from an angle, less actual depth is needed to create the necessary separation. http://mythbustersresults.com/episode34 Sep 12 10, 11:25 PM