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...
Sometimes you can find these critters armless in the campaign, but if you want to, you can actually shoot off the arms of Elite flood forms and have them follow you around at your own leisure, unable to attack you. Some HEE regulars were able to create 3 or 4 of them at a time and enjoy the company of 4 man/elite/flood escort.