Place it as the payoff at the end of a short build-up, then follow it with a Bruh reaction to sell the anticlimax, or open with a goofy ahh sound before it for a longer run-up.
关于此声音
This clip is a single drawn-out vocal shout of the word Backfischhhh, stretched across about twelve seconds with the final syllable held long. It feels deliberately over the top and silly, like a joke pushed just past the point where it should stop. The drawn-out delivery makes it land as a playful interruption rather than a normal spoken word.