Place it just before the payoff in an edit, then follow the reveal with JoJo To Be Continued for a dramatic freeze, or Mayuri Tuturu for a softer anime reaction. For a failed joke, end with Awkward Moment instead, letting that second cue confirm the joke did not land.
About this sound
This is an eight-second vocal loop of someone chanting “tu tu tu” in a quick, steady rhythm that speeds up as it goes. It feels playful at first, then strangely tense as the repetition builds, like a joke is about to land. That rising, playful pressure makes it a natural fit for anime edits and reaction clips waiting for a goofy reveal.