Elite helmet glitch

There is a glitch with the helmet of an Elite corpse in Halo 3.

At the end of the level Floodgate (Level), when entering the crashed Flood ship, a player will find several dead Elites lying around. Some of them have a strange cross-helmet that appears to be a blending of an assault helmet and a combat one. It appears that the game had attempted to render both helmets on the head of the Elite, and thus both appear, overlapping one another.