Halo 3 Easter Egg - The Grunts Must Love Master Chief!

First, go into theater mode and view a mission where there are sleeping grunts. Then, pause the film and detach from your spartan
friend. Next, fly in real close to a sleeping grunt. Zoom in on the back of its head and you should see a faint tattoo of Master Chief's
helmet! This is very similar to an egg in the original halo: there was a marathon logo on the back of grunts heads.