Looney Tunes began as a Warner Bros. animated series in 1930, and its bright, brassy opening theme became one of the most recognisable cartoon signatures in the world. Generations grew up hearing it before Bugs Bunny, Daffy Duck and the rest of the cast, so the melody now works as instant shorthand for classic animation and mischief. Online, creators reuse tiny fragments like this one because the sound alone tells viewers to expect something funny, chaotic or nostalgic, even without any picture.