Scrolling around screen with space bar

So, I'm sure lots of people here know about this already, but I though I'd post anyway...

If you are on a page that is scrollable (i.e. has the scroll bars on either the right hand side, the bottom or both), you can depress the space bar while hovering over empty space. You will get a four headed arrow. If you click while holding the space bar down, you may now scroll up, down, left or right in the screen. It’s just a navigation shortcut, so that you don’t have to go all the way to the right or the bottom to scroll.

Just thought I'd share.

Mike