Put it at the start of a failed-thought gag, then follow it with the long brain fart for a repeated mistake, or swap in the fart with reverb for a bigger reaction, and close a deadpan moment with the bruh sound.
關於此聲音
This is a fart effect run at twice its normal pace, so the rumble squeezes into a brief, squeaky raspberry that is gone in under a second. It feels instantly silly and deflating, puncturing a serious moment and making a failed thought, a bad idea or total confusion clear without any words.