The beep beep belongs to the Road Runner, the speedy bird from Looney Tunes who first appeared in the 1949 short Fast and Furry-ous alongside Wile E. Coyote. In the cartoons the sound marks his arrival and departure, usually just before the Coyote's latest trap backfires, and it became inseparable from the character through decades of television reruns. Online it spread through cartoon chase clips, reaction videos and soundboards, where Spanish-speaking fans also know him as Correcaminos, and it remains popular because it instantly signals speed, escape and a joke that needs no explanation.