Hall of Infinite Doors

You walk through the door to the north. As you enter this room you notice it is different from all the rest. The walls and ceiling are made of slate and the floor of cast iron. As you reach the center of the room the floor breaks into two seperate sections and folds downwards dropping you into a pit. You fall for quite some time until your fall is broken by a large sharp spike. As you lie impaled on that spike in your last few moments of life you notice many skeletons around you. Most likely these are other fools who entered this room and never lived to tell the tale. As the blood rushes out of your body you realize that you will soon be among them...