You
hear a loud noise echo behind you. You turn and see a big boulder
heading towards you. You run and run but you can't get away from it.
You duck and it just misses you. You run into a room to catch your
breath. The door locks behind you.
You swing round to try and stop the door, but you are too slow. You
catch a lever on the wall. A huge hole opens in the floor and you
fall helplessly into deep space.