So playing through campaign. Forget what level it is, but it's when they are evacuating civilians. Now this glitch happened when I was on the elevator with the captain. What happened was I was standing in the corner of the elevator behind the captain. I was T-bagging him. As soon as the elevator opened I went to step outside it while still T-bagging when my character skipped backed a bit then forward. The next thing I know he is levitating though the map going underneath it. Eventually he stopped going down. So thats when i decided it would be a good idea to record what was going on. Has anyone else encountered such an occurrence? Oh yea, also i am playing on the xbox 360... Like a boss.