Run Rabbit Run began as a British music hall song written in 1939 by Noel Gay and Ralph Butler and popularised by Flanagan and Allen during the Second World War. Its simple chorus later passed into children's singalongs and playground versions, which kept the tune widely recognised for decades. Online, creators shortened it to the repeating rabbit line for chase edits and sped-up escapes, much like running in the 90s is used for fast movement jokes, and the clip now circulates as a lighthearted running cue.