His open palm struck the table with a flat crack.

The flat crack of Siuan's palm on the table cut her off.

As Levin reached for the door handle, a flat crack echoed through the building.

Here and there, a small, flat crack sounded on the moor.

Soon lightning was crashing all around and the thunder came in big, flat cracks, as if a building had fallen down.

Vertical, of course, because the flat cracks would immediately fill in from above.

There finally came a flat crack of a pistol.

There was a flat crack as the power tubes discharged.

The flat crack of the rifle in the open echoed across the mountain range.

Simultaneously there was a flat crack from the back of the theater.