Here is an interesting comparison of Cortana over the course of the 4 halo games:
PTesh adds his dulcet prepubescent tones over the top of one of the new trailers for weapons...
Try upgrading your browser to Google chrome (you wont regret it). There is probably an IE...
Hidden Mendoza Model
Level: 343 Guilty Spark
In 343 guilty spark there is a hidden Mendoza Biped. To find him start the level and keep pressing the grenade button until one grenade is thrown, then stop. Now wait until the pelican crashes on the edge of the map the exit the vehicle using the "action" key/button. From there keep walking forward until there is a kind of drop off to your right, go down onto it. Now continue forward until you run into the Hidden Mendoza Biped! The purpose of putting him here is to speed up the loading of the jenkings video. Hiding it here kind of acts as a pre-load for Mendoza.