Aliens vs. Predator 2 Easter Egg - Egg?

On the level betrayal, when you are on the side of that bilding way up in the air, type in the invincible cheat and jump off the bilding. once you hit the ground you will notice the large square shaped white patches of land. in one of the patches there is a egg. It's too big to be the egg of an animal from earth. It's white,perfectly round,too small to be an alein egg,and it looks like it's about to hatch because something is kicking inside it, but it never does hach. You can pick it up, But the weirdest part is that when you pick it up it sounds like you just picked up a gun or ammo.