No, I mean the sound when the sword hits the Deku Scrub. You hear it running away, you chase it, and you slash it and it makes a sound.
Its not about the Deku Scrub either, a Big Skulltula makes the same noise when you deliver the final blow. Almost every enemy does. But every enemy has another ending sound. Like the Scrub has a little cry as dieing and the Skulltula starts falling on the ground and stuff.