The phrase comes from the Italian internet clip credited as Il Mac 64 - Prenditi Sto Cigno, circulated under the Internet Cultura name with tags referencing Mac64, a swan and an entrance on a trapeze. In Italian meme sharing the line works less as a quote people explain and more as a reusable reaction sound, passed around in compilations and edits. Its staying power comes from the language barrier for non Italian viewers and from the sheer specificity of the swan for Italian viewers who instantly picture the nonsense.