Hall of Infinite Doors

You give in. By daybreak you realize what fun you have had with her. She's an exciting woman. Unfortunately, not only do you struggle with the answers to the midterm, you struggle to stay awake. You mark down what you can, and do your best with the essay, but you know you've done poorly.

Sure enough, the grade comes back: "F". You have failed, and the rest of your life suffers accordingly.