Here is what I am thinking:
I have long web page and when the user reaches the end, I don't want the scrolling to stop just then, but I want to reload the page again from the bottom and continue the scrolling.
Detailed
As the user scrolls to the bottom, I want the top of the website to be removed from the top and placed at the bottom in a smooth way and this effect has be vice versa also. I mean if user scrolls up at the top of the page, then the footer must load at the top and continue in this fashion.