So i was playing on Lighthouse last night, and this guy was running around and when ever he would go stealth he would drop half way trough the map (well a little more the half way). I watched the Kill Cam and the ground was at about his chest, and when he came out of stealth he popped all the way back up.

I am seeing if this is a exploited Glitch, or just a random Glitch that doesn't need to be watched for.

I fell through the map on single player - all the way down though, and couldn't move, had to quit to restart :\ Never seen what you've described however. yet.

http://i.imgur.com/yjEW0.jpg

haven't seen it yet, but I have walked thru a wall under the ramp closest to the glass overhead walkway on "Wall Street". went under there to power back up and kept going right on thru! seemed like a one time thing and could not do it again. kinda strange too since I went thru going sideways.