I don't know if it is true or not, but my friend said he was playing the mission where you are in the Falcon and shutting down the jammers. Said after he died, her heard a marine say, "You really sh*t the bed this time."
Like I said, don't know if it's true, but I can certainly see a marine telling him that.
And my fav is when 6 is trying to talk Jorge out of the manual detonation, he gets all intense and says, "Don't deny me this." You could just feel the emotion he was feeling and how much he hated the Covenant for "Killing" Dr. Halsey and attacking Reach.