"Hey! You're not chicken, are you?" You decide to go in.
Sure enough, after you enter, the door slams shut and you find yourself in a long stone hallway with torches as your only light. You start feeling sorry that you went through the big door, but when you turn around, all you see is a big brick wall where the door had been! Now you KNOW that there's something terrible lurking in the shadows. You huddle up in a corner and wish you were any place but here.