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