It sure was! [Distraction: Successful.] The glue was invented when a stronger one was being looked for; instead it came out the other total end of the spectrum. The inventor kept it within the company for five whole years, never knowing quite what to do with it, until a colleague thought of using it to anchor bookmarks to a hymnal.

Even the standard yellow color everyone knows was an accident! The lab next door to the team working on the notes only had yellow scrap paper to use.