Put it at the end of a reveal or entrance, after the visual payoff, then follow a successful moment with Rizz Sound Effect, or follow a failed attempt with Emotional Damage Meme Sound to undercut the brag.
About this sound
An eight-second Russian voice line says 'Какой же я красавчик', meaning 'what a handsome guy I am', with a smug, pleased, self-congratulatory delivery. It lands as playful bragging, genuine self-admiration mixed with clear irony, so confidence itself becomes the joke instead of serious praise.