The corridor is very, very long. It keeps winding around and you get the feeling that you're walking in a complete circle. Finally, you come to the end and you see a big door. You have some slight reservations, but you don't feel like walking all the way back. So you walk through the door only to have it shut behind you, locked. You find yourself in a big empty room. There is a another door in the room, but that is also locked. The only way out is a corridor on the other side of the room. You walk down the corridor and come to two doors. One on your left, which unsurprisingly is locked. The other door is right in front of you. You keep your fingers crossed as you open the door and walk through.