Place it at the end of a fake diagnosis bit, after the explanation lands and before the reaction shot. Pair it with the bone crack sound for a neck complaint, or follow it with the dun dun dun sound when the invented procedure is revealed as serious.
このサウンドについて
NG0 Neckertomy is an 8.9-second sound effect clip with an opaque, made-up medical sounding name and no clear voice or story attached to it. That blankness gives it a curious, slightly uneasy feeling, because listeners are left waiting for a meaning the clip never explains or confirms for them at all.