New discovery: After defeating the Covenent at Sunaion, the Warden Eternal will appear at the end the mission.
The Arbiter will help you fight him of course, but here’s the trick:
Easter Egg: Get Warden Eternal to blast or kill the Arbiter. The Warden will then say: “That was not cool man”. He might also blast a lot after that.
Tried to film. Couldn’t thanks to 343’s incomplete theatre mode. Try for yourself.
EDIT: Or try blasting him with a plasma pistol.
You could have just “Xbox, record That!”
> 2533274950478805;2:
> You could have just “Xbox, record That!”
THIS XD
Il try that
You need Kinect for voice commands but double pressing large xbox button on controller 
followed by x records last 30 seconds. I think its x to record
Someone link a youtube video when they get it that sounds hilarious xD
> 2533275007247244;6:
> Someone link a youtube video when they get it that sounds hilarious xD
No snapshots or record videos in theatre mode 
Double tap the large x on your controller.
Press X. (the little one)
Last 30 seconds recorded.
I just got it after reading this post. Ill upload asap
> 2535467925282728;9:
> I just got it after reading this post. Ill upload asap
Send us a link 
He also said tons of funny stuff while I was struggling to get him to say it such as:
“Would you stop breaking those things? I just made them!”
And “GO AWAY! … I… don’t mean to be rude”
“Come on, that’s not funny!”
Ill also upload a vid of him knocking this arbiter off the edge and yelling “WORTHLESS”
Lol he’s a pretty funny guy
Here is the “not cool man”
Here is the “WORTHLESS”
> 2535467925282728;12:
> Here is the “not cool man”
>
> Gamer DVR - Xbox clips, Twitch clips and streams, Xbox screenshots, Xbox videos, Xbox DVR and more on Gamer DVR!
>
> Here is the “WORTHLESS”
>
> Gamer DVR - Xbox clips, Twitch clips and streams, Xbox screenshots, Xbox videos, Xbox DVR and more on Gamer DVR!
Hilarious!