Gravity Falls is the Disney animated series created by Alex Hirsch that aired from 2012 to 2016, following twins Dipper and Mabel Pines through a town full of monsters and conspiracies. Its mix of dry wit and slapstick made its characters' laughter a natural meme ingredient. This 53-second upload appears to be a fan-made compilation rather than a single scene, and it circulates on soundboards as a long-form reaction laugh. Fans of the show keep reaching for it because the voices are instantly recognisable to anyone who grew up with the series.