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...
After you find him in the flood blob thing, there is a bunch of tentacles coming from the blob and attached to the ceiling and light panels. A couple (2 or 3) are just laying on the floor, and hang off the edge of the platform. if you look closely u will see his pipe in the very end on one of tentacles that hang off the edge of the platform. It's very small, smaller than the real thing. They probably shrank it to make if harder to find.