By that I mean like in Assassin's Creed 2, there's that easter egg with the water creature in the cave. Or like mythical creatures showing up like Sasquatch in Red Dead Redemption. Stuff like that. Has Lochness Monster ever made an appearance? I know there was that one monster that pops out of the water in RE4 (saw it on youtube).
And if you have youtube videos for me, that would save me.
EDIT: And PLEASE tell me what the specific easter egg is if you don't post a youtube video so that I have some idea other than just the title of the game.
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~Halo Now you learn the mistake of challenging me.
http://img408.imageshack.us/img408/2734/hieis.jpg