Easily one of the most famous lines in Halo for being the most ridiculous piece of dialogue in any Halo game. Even Bungie made this dialogue the name of a checkpoint in Halo: Reach, it’s so popular.
It’s not in cutscene, it is in the mission ‘Halo’. Right after the Pelican drops down to pick up the troops and gives you a Warthog (which is the first time you drive a Warthog in the series). You then drop-down to a very obvious Forerunner built cave. Then Cortana says, “This cave is not a natural formation.”
343i, please tell me you’re keeping this line in, it’s easily the best out of all of them!