Travians' CSS Sprite Animation

I have came across a browser game website, http://travians.com/ . This website at first glance looks like a flash animated or GIF animated website as you hover your mouse on the characters and other things on the page, specially on the mouse on the sign post(the login form). When you hover on the mouse(not the one you're holding right now). It performs a tumbling(backtive), then goes back hanging on the signpost. On first glance I thought this is a GIF or flash, but when I inspected it it was actually a CSS sprite. http://travians.com/img/portal/interface/chars/mouse.png I wonder where I can use this technique.