Remote Linking
Two different elements in two different areas of the page under the same anchor link and react to the same hover event. Pretty cool effect that uses nothing but pure CSS.
It is done by positioning the em in the list relatively to the li items (which are positioned absolutely) and changing the color of the em elements when a particular list item is hovered. This is very cool and useful but not much practical as it requires different positioning of the elements. Can be used if the elements are less but for greater number of elements, this effect is not much useful.