Gracie is a character from Night of the Zoopocalypse, the animated adventure film about animals surviving a strange outbreak inside a zoo. Her giggle comes from a lighter moment in the story, a reminder of her youthful, optimistic personality amid the chaos around her. Fans began sharing the laugh on its own because it is instantly recognisable as warm and cheerful, very different from the film's tenser scenes. It has since become a handy reaction sound for cute, funny and wholesome edits, where a brief burst of laughter says more than dialogue.