I don’t know if this option has been available since the launch of Google Analytics, but is the first time I’ve clicked on it. (I’m still hooked with StatCounter.com)

This option shows your web pages with a small percentage bars located over every link. The blue bar represents the frequency each link has been clicked from that page. The green bar shows the “quality” of those clicks (you must have goals defined). Clicking the bar displays more detail in a small tool tip. It’s a nice visual way to analyze navigation patterns.