When I first saw COD Ghosts it made me think of the halo ghosts of 2, 3, and reach. I am not talking about the vehicle. I am talking of an unidentified player with no gamertag and isn't on the scoreboard. they move erraticly and usually "slide" across the map. Generally they aren't hostile unless provoked, but have been known to kill players immediately after spawning. many therories arose as to way these phenomenon exist from lag to forgotten delted coding, to even bungie spying on players. I have only seen one on halo 3 black reach. Freaked me the fuck out considering I was only playing with my friend.
here's some actual footage