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...
Shoot through shield
You know those stationary shield generator thingys? Get something that shoots a lot and has a lot of ammo, i mean the Assault Rifle. then walk into the shield, and keep walking into it. you should see your gun, but your in-game model's gun actually went THROUGH the shield! if people shoot you, the shield will protect you, but you can shoot from behind the shield!