| 31. | The thwack of club striking ball?
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| 32. | With a resounding thwack, Josef Vondracek brought his wooden mallet down on the flapping carp.
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| 33. | The ball disappeared with a loud " thwack ! " into the culvert below.
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| 34. | The menacing thwack-thwack-thwack of the choppers seemed to put everyone on edge.
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| 35. | The menacing thwack-thwack-thwack of the choppers seemed to put everyone on edge.
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| 36. | The menacing thwack-thwack-thwack of the choppers seemed to put everyone on edge.
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| 37. | Boxers hop on one leg while the other thwacks the mitt in flurries of five or six.
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| 38. | Thwack sounds like two-by-fours smacking together flush in the heart of the wood.
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| 39. | "thwack " of our guide's paddle against the side of his canoe.
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| 40. | It is also a virtuoso percussion concerto, using every imaginable thump, thwack, ding and gong.
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