Hahaha, so I was messing around a bit more with that 1337 room during an 9 player match. It took me a few rounds but I finally lured someone over to it. I quickly hit the door open part of the bookshelf and we both got sucked in...except the door closed on him and he got trapped. I turn around and I just hear frantic gunfire and then his arm sticking out of the wall as he tries to escape. At this point I'm laughing pretty hard and I decide to go up and let him out before he died.
Then he killed me. Ungrateful bastard. xD