Kerthump

Ker-thump, shatter, shatter, Ker-thump, shatter, the sound of the round thermos rolling towards the stage.

Then, all of a sudden, you hear that hollow sounding "ker-thump, ker-thump, ker-thump" of a deer bounding through the woods ahead of you.

They waited one long excruciating minute, while Sam counted the kerthumps inside her chest.