1.   Almost immediately there was a dull thud as it fell on the floor.

2.   Another dull thud behind his left knee.

3.   As he moved along the rows of guns, his wooden leg sounded dull thuds.

4.   He hit the ground with a dull thud.

5.   Plastic produces a dull thud, while glass gives a high-pitched clink.

6.   The gates shut behind him with a dull thud and the sound of the wind died away.

7.   The gunshots were no longer dull thuds echoing off the hill but reports, punctuated by the snapping of triggers.

8.   There was a dull thud as the box hit the floor.

9.   The coffin closed with a dull thud.