First thing first, we are going to talk about Parallax effect. If you are not familiar with Parallaxing already, it is a technique to move/animate elements and objects (such as background image) with respect to the mouse position. Rocket science? Just have a look at Nike website and experience cool graphical effects achieved via parallaxing.
Interesting? Let do it on your own website. All you need is Plax, a simple jQuery plugin for parallaxing elements in your site based on mouse position.
Do try it leave a comment to share you experience with us.