The Joker first appeared in Batman comics in 1940 and his laugh quickly became as recognisable as his green hair and purple suit. Actors from Cesar Romero to Heath Ledger and Joaquin Phoenix each gave the cackle a different tone, but the idea stayed the same: a laugh that is too long, too loud and completely without joy. Clips of the laugh were shared widely on soundboards and social media, where this short version became a reusable reaction for anything mischievous or unhinged.