00:00sink a mug under water
00:01thereafter place a nail against the bottom
00:03and raise a hammer to hit it
00:05Normally this would shatter the mug
00:08because ceramic doesn't bend
00:09Meaning cracks can race through the whole cup
00:12but underwater
00:14The water surrounds the Muv
00:16and absorbs the shock waves
00:18This prevents damage
00:19locked near the nail
00:20so instead of the crack spreading everywhere
00:23The nail just punches out
00:24one small hole
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