Caillou is the young star of a children's animated series, and GoAnimate, later renamed Vyond, became a popular tool for fans to make their own animated parodies starring him. In many of those videos Caillou throws tantrums, gets grounded, or bursts into tears, and clips of his crying were lifted and shared as standalone reaction sounds. Like a scream meme, the wail works because it is instantly recognisable and far bigger than the situation it accompanies. Editors still reuse it for grounded parodies, TikTok edits and meme compilations where an over-the-top cry lands the joke.