Halo Easter Egg - Marathon Symbol

In the main menu the faded blue lines behind the Halo logo are the Marathon Symbol ( I think and old game made buy bungie) Also if u have Halo Map Tools Open up a Campaing map and go to Bitmaps and look for grunt head and then on his nostril thing its there at a differnet angle. Also if you 343 Guilty Sparks Bitmap in the C10 map his Blue light thing Is in the shape of marathon symbol.