Looney Tunes began in 1930 as a Warner Bros cartoon series alongside Merrie Melodies, and its opening music became one of animation's most recognised themes. The tune most associated with the classic shorts is 'The Merry-Go-Round Broke Down', adopted in the late 1930s for Bugs Bunny, Daffy Duck and Porky Pig cartoons. Its fast, fairground energy suited every cartoon chase and pratfall. Decades later, clips and re-runs kept it familiar online, where creators still use it to signal old-school cartoon humour instantly.