I was playing coop on xbl and there was 4(maby more) playing at the same time let me explain
I don't know how it happened but i was the host on the level where you get the hover craft with the rocket and you escaping ( I think its 6) and some one comes in. they start talking in a British accent, second later there's a what sounds like a young girl (like 12 young) and a what sounds like a african American. and I thought I heard another voice for a brief time but it soon stopped. I think this is one guy messing with me so I start the game. One of the voices says there the young girl says here game tag wich is different then the one i see on the screen
When I start the game I realize there all talking at the same time. but I only see 1 other dude. This double being the young girl. about a min. into the level I notice a stationary guns moving with out any one in it. The british guy says its him. I don't see it shoot.
Soon every one starts to argue. I try to figur out the situation. The young girl points out the obvios fact that this is a glitch, The britsh guy says its a part of the game, and the afercian american guy yell at every one to stop cyring and play. So the britsh guy says something anti-american. The afercian american gets lost and makes sure that every one knows it, people start to yell, and no one uses any strategy and just rushes though the map.
Back to the glitch, The only other thing i saw was at the crack in the wall that you blow up, I was the only one that could go through. And the people I could not see could not see it blown up. I went though and died and I could not be revived. People were yelling,some one left, it lagged a little and I needed to go. So I turned off my xbox. I know I should of stayed to figer it out but i needed to go.