Feature Request: Footer on permalink pages

I'd love to see Hacker News add a footer to the bottom of discussion pages, even if it's just an orange bar (like at the top) with no additional text. The reason for this is that as I scroll down the page by pressing the space bar, it's not immediately apparent when I've scrolled to the bottom, and when this happens, the spot where I stopped reading (before scrolling) is somewhere in the middle of the page, not at the top. It's a little disorienting to re-read the same comments again and not realize that you're doing it.