Place it just before the reveal in a short edit, then follow it with Bruh and Oh My God Bro Oh Hell Nah, letting the warning set up both responses in sequence.
关于此声音
This is a short Portuguese voice line, lasting about two and a half seconds, warning that someone has a nose. The joke lands because the warning treats an ordinary feature as a danger, giving it a silly, surprising humour. It comes from ASDFMovie, the animated sketch series known for quick, surreal jokes.