When you make a witty and very solid post in a thread and it's the 14th comment on the page. Then some twit follows behind you with something meaningless and moves the discussion on to a fresh page, while your post becomes lost in the tides. Can also coincide with someone else saying exactly what you said on the previous page and getting props for it.
Now that I think about it, I know several on this forum that do just that. Follow someone around and just regurgitate what that person previously said, and spin it as their own.