Place this clip at the reaction beat, right after the mistake lands and before any commentary resumes. Follow it with a bruh soundboard button for a deflated second beat, or precede it with an oh my god meme button when you need the reaction to escalate in two steps.
Über diesen Sound
This is a very short vocal clip, about one and a half seconds, built around a single shouted exclamation that sounds like affkh iyyh. The delivery is abrupt and garbled, more noise than clear words. It gives listeners a silly, caught-off-guard feeling, like someone reacting out loud before they can form a proper sentence.