Motorstorm Easter Egg - Please Drive Dangerously

Start a race on "The Grizzly" and about half way around the track you should see a large billboard featuring a large picture of Monument Valley adorned with the words "Welcome to Motorstorm".

However you may not see, at least at first that there is a warning underneath that says "PLEASE DRIVE CAREFULLY". Or at least it would if the word "CAREFULLY" wasn't obstructed by a piece of corrugated metal. This is a reference to the fact that in Motorstorm you are not supposed to drive carefully at all.

Here is a picture of this egg: http://img519.imageshack.us/img519/5153/motorstorm1qm6.png