Put it at the peak of the zoom, just before the reveal lands, then follow with a bruh for the deadpan reaction and baby laughing as the payoff for the cute moment.
About this sound
This 2.8-second effect takes the familiar Vine boom hit and makes it gentler and more cartoon-like, trading deep bass for a bright, bouncy thump. It feels funny and charming rather than intense, turning a small reveal into a mock-important moment. The softer tone suits ironic, low-stakes jokes where the drama is deliberately overdone.