Place it at the exact turning point in a scene, then follow it with a SpongeBob Fail sting to underline the mistake, or a Dramatic Dun Dun Dun cue when the reveal needs more weight before the story resumes.
About this sound
This clip is a high, grating drag across vinyl that jerks to a stop, lasting about six and a half seconds. It lands with a jolt of embarrassment, as if everyone has just realised a mistake at once. The effect grew familiar through radio, film and television edits that froze a scene, and short-form creators later made it shorthand for an unexpected turn.