lol ive never fallen down there but i once saw someone get stuck underneath the PLA main on that 'hills of hamyongunging' or whatever its called. someone blew a destructable wall up and a few peeps went through it for some reason. anyway the wall went back up when someone was in it and none of us had any slams or demo packs.
we threw nades at it and he got out eventually but it made me laugh watching his name bimbling around behind a wall going 'wait what happend to the entrance.....?'