The audio clip titled "Knocking on Wood" opens with the distinct sound of a hand rapping against a wooden surface. The rhythm of the knocking is steady and purposeful, echoing in the space around it. There is a sense of contact as the hand hits the wood, producing a solid yet resonant sound each time. The wood responds with a rich, full-bodied echo that suggests the solidity and texture of the material. The knocking persists in a consistent pattern, creating a percussive tune that is at once simple and captivating. The audio ends leaving an impression of the intriguing interplay between the human touch and the natural element of wood.