Place it at the end of a short reaction clip, just after the childish moment, then follow it with Baby Laughing Meme as the next reaction or Goofy Ahh Sounds when the joke needs another silly beat.
关于此声音
This is a roughly two-second clip of a baby babbling 'gugu gaga' in a soft, high-pitched voice, with no other words, music or background noise. It feels silly and sweet at once, like a tiny, carefree joke that lands instantly and makes a tense moment feel lighter. The simple babble is easy to recognise and hard not to smile at when it pops up unexpectedly.