The melody comes from Titanic, the 1997 film whose theme My Heart Will Go On, written by James Horner and sung by Celine Dion, became one of the most recognised movie themes ever. A badly played flute and recorder version began circulating online as a reaction sound, because almost everyone knows how the tune should sound. That shared recognition made the wrong notes instantly funny without any setup. It has since become online shorthand for an attempt that starts confidently and collapses, and it remains popular in edits, memes and fail compilations.