Place it right at the impact point of a fail edit, then follow it with the Anime Ahhh Sound Button for a bigger reaction, or precede it with Boing Boing to set up the clumsy tumble before the payoff lands.
About this sound
This is a very brief clip of Gamma letting out a high, cute scream as she loses her balance. At under half a second it lands as pure startled embarrassment, sweet rather than scary, with that clumsy charm that makes her mishap feel funny and endearing. It comes from The Eminence in Shadow, from the moment she tries to swing a sword and falls over.