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...
Siege of Madrigal
Level: The Covenant
After the part where you have to defeat 2 Scarabs at once, don't go into the building and proceed with the mission just yet, Instead climb on the left side of the structure onto a Grey metal support beam. Keep walking along the beam on the left side until you reach the end. At this point, Martie's famous Siege of Madrigal should start playing. See the video below for more a demonstration. (One of admin's first video)