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Knocking on a wooden surface or door.
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Knuckles crack
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Single knock on a hollow wood door, knuckles impact
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Knocking on a hollow wood door with knuckles
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Cracking knuckles
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Knuckles being cracked. Vintage recording.
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Knocking on a wooden surface or door.
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Knocking on a wooden surface or door.
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Knocking on a wooden surface or door.
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Knocking on a wooden surface or door.