Over the years I have heard my share of strange questions and silly comments from people who call the computer software company where I work as a tech support telephone operator. But one day I realized how absurd things can sound on the other end of the line when I heard myself say to one caller, "Yes, sir, you must first upgrade your download software in order to download our upgrade software."
(来源：EnglishCN.com)

在下载你的升级软件之前你必须升级你的下载软件－－是不是有点象绕口令？ ：）