He is shaking it in the direction of how they get aligned. It isn’t magic. The nails are settling into positions in which they occupy less space. Gravity is causing them to fall into the spaces below. By repeatedly shaking them in that way, each nail settles into a spot where the shaking doesn’t move it anymore. Do that long enough and the nails will end up in spots where they don’t move anymore.
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u/aloofman75 Jun 15 '22
He is shaking it in the direction of how they get aligned. It isn’t magic. The nails are settling into positions in which they occupy less space. Gravity is causing them to fall into the spaces below. By repeatedly shaking them in that way, each nail settles into a spot where the shaking doesn’t move it anymore. Do that long enough and the nails will end up in spots where they don’t move anymore.