With no clear original source attached to this short clip, its life has been almost entirely online, where short laughing sounds travel quickly between meme pages, reaction videos and chat threads. The phrase ROTFL, short for rolling on the floor laughing, was already a familiar piece of early internet slang, so the sound feels instantly recognisable even without context. That familiarity is why it keeps circulating: it works as a shorthand for finding something funny, especially in fast, visual edits where a spoken reaction lands quicker than text.