Phineas and Ferb is a Disney animated comedy series that premiered in 2007, following inventive stepbrothers and their pet platypus Perry. Its episodes often close with music, and this short guitar flourish became one of the show's most recognisable audio signatures. As clips from the series circulated on YouTube and social media, editors began lifting the sting for their own videos. Its association with a finished invention or a neat conclusion helped it survive beyond the show as a nostalgic shorthand for wrapping something up.