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Five hits of a door knocker
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Bowling pins knocked down
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Knocking a trash can
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Knocking a trash can
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Single knock on wood
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Knocking on the wooden frame of a door glass
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Knocking on a hollow wood door with knuckles
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Knocking over aluminum pop can
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Knocking over a wooden knick knack
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Knocking over and picking up aluminum pop can
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