Trendy Footer Reveal!

Description
One of my favorite, trendy interactions is a footer that reveals itself once the user gets to the bottom of the page. I've used this effect a number of times, and thought I'd share it with you (trendy vertical nav included)! Enjoy, and clone away!
For Cloners: Be sure to make the height of the section-footer-spacer to be the same as your footer height is for the reveal to work! Or, if your footers height is content-based, duplicate the footer as you want it, rename it, and give it the following values: z-index: 0, opacity: 0, position: relative. That should solve any issues you might have!