...that the military vehicle known as the Warthog has a sports car variant, the Civilian Warthog?
...that a Flamethrower was intended to be put into the first two Halo games, but for balance reasons wasn't included in campaign until Halo 3?
...that Spartan-III players have a death animation in Halo: Reach that depicts them aiming their weapons at the enemy in front of them while crawling on the floor?