Halo Trailer Easter Eggs?

[Crash]

what you didnt see in the halo demo:

The demo shifted away from the crater to the part of the level you see the Master Chief walking in from. He was controllable, which means that the trailer indicates just how good the game will look. Lehto was able to zoom in on the Master Chief with the camera, and you could see the many different ways light reflected objects onto him. For example, you could see light reflect off the ground and onto his armor. A new materials system shows the difference between his armor and the rubber undersuit. It's so detailed that if you bring the camera close to the Master Chief's visor, you see everything in front of him reflected in it, right down to the ammo counter in his rifle.