Place this clip at the recognition beat in an edit, after a short build with the sudden suspense sound and before a confused reaction, then follow it with the huh sound so the sequence moves cleanly from setup to punchline without extra dialogue in between at all.
Über diesen Sound
This clip is a spoken German line lasting about eleven seconds, in which a voice says the phrase that translates as we know your voice. It carries a tense, quietly unsettling feeling, because the words suggest someone has been recognised despite trying to stay unnoticed, turning a simple identification into a small moment of exposure for the speaker.