Oh is this like the one in Halo 3 when you started new round and whatnot? How did this happen may I ask and...Is that the turret from that Hog or another? :S
Something happened where I was on the turret of the gauss hog, and at the same time the game switched hosts, and teleported me to that area because my team mate was so far ahead. And the turret is from that warthog.
Actually when I moved it at all it just pointed directly up into the sky and then it wouldn't budge. I was about to die so I got off and it just sunk under the map.