Place this clip right after a failed explanation in your edit, then follow it with the Dun Dun Dun Sound Button for the reveal, or lead in with the Anime Wow Sound Button when the nonsense is a reaction to surprising news.
About this sound
This clip is a 7-second stretch of fast, made-up babbling, a voice tumbling through nonsense syllables like yagaboo and dibiity with no real words at all. It feels gleefully unhinged and confusing, the audio equivalent of a brain short-circuiting mid-sentence and just carrying on anyway.