My entire class failed an electromagnetism quiz. I knew it was rigged! The instructor just said they would pick a random, cumulative question from somewhere in our textbook and give us 10 minutes. After we finished the quiz the instructor mentioned that all our previous quizzes, and the one we just finished, were open book surprising the entire class since nobody knew from it never being mentioned ... 
Next 2 days of my life will be spent writing another large essay.