That happens a lot in the Text Games section which I frequently visit as well.(boredom) A lot of the threads, for example if one had only 45 pages, has like a 46th page in advance that links to the 45th page for some reason. 0_o
Here's an example:
Ban the person above!. It's got a link to an alleged 56th page that doesn't even exist as of me writing this post, and it links to the 55th page.
EDIT: Not anymore. As a result of the actual 56th page having been made with the right number of posts, the faulty 56th page is a goner. Found another one with one page in advance though, and there are a few others:
Official post a pic of yourself!
Though this one's a goner now as well.