acctualy u cant blox up the scarab phantom or anything else you cant blox up with a rocket and if you have action replay for xbox (if u dont go to game stop and pick it up for $30)go to community and xpand halo 2 list and look for tunnle before scarab gun and copy it to your memory card and then take your memory card and copy onto yur xbox and start up halo 2 and when u select yur profile then select the one named doyle and resume and u should fly out of the tunnle where u have to lure the banshee and look for the bridge connecting the 2 buildings and it will hover over a warning the(youll see why its over a warning when your fire it lol)