R2-D2 is the astromech droid from Star Wars, first seen in 1977, and his beeps, chirps and whistles have become one of the most recognisable robot sounds in popular culture. Because audiences understand his mood from tone and rhythm alone, short bursts of his chatter work well as a reaction sound, even for people who have not watched the films closely. French meme pages often title chaotic clips like this one en roue libre, meaning freewheeling or out of control, and the sound keeps spreading through reaction videos, gaming clips and comedy edits where a machine or plan goes haywire.