There was a ghost in Halo 2 lockout, it was called the ghost of lockout (it was a white spartan).
This might be possible, but i highly doubt it since this game has the video functions... i mean why not just capture it?
Also Bungie has removed all this kind of stuff from Halo 3, as halo 2 had. And by this stuff i mean the fun stuff...
Super bouncing... Rocket jumping... etc.
The marines dont even say "HO-RAH!" anymore

... altough there is nothing to ho-rah about... since earth is glassed.
-Fin

ish