She said the floor started shaking as the materials were stacked up, and she later grew afraid to walk under the mezzanine.

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"My house started vibrating, and the pictures on the wall started shaking, and then I heard two sonic booms, " she said.

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Dawson told the Archive of American Television in a 2010 interview that his trademark move started early on in the show's run, when he saw a woman shaking as she struggled to come up with the name of a green vegetable.

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