It may only be a coincidence, or it may be an unintended subconscious action, or it just might be that J.K. Rowling knew what she was doing when she wrote Harry Potter and the Goblet of Fire presumably in the year or two prior to its release in 2000. In chapter fourteen she used the words “prediction”, “decapitation,” and “what’s in the box” all within two lines. Did she subconsciously start the “What’s in the box” meme referencing 1995’s Seven before the Internet even had such a thing? Time-Life’s Mysteries of the Unknown. Read the book.