Place this clip before the visual payoff, not after it, then follow the payoff with a bruh soundboard button for the deadpan drop, or an emotional damage meme button if the stunt ends in total embarrassment for everyone watching.
About this sound
This clip is a single male voice stretching out the phrase I'm bout to cuuuuhhhhh for about ten seconds, the vowel held and pushed louder as it goes. It feels gleefully unhinged and over the top, turning anticipation into a joke by itself, like someone has completely lost control right before the payoff lands.