oh, we got high standards - you just pass them, easy :D

But ouch on the surprise final. If you think you didn't pass (well, I hope that your freaking out is just habitual and has nothing to do with how you actually did on the exam), I bet you'd have a case for some help/mercy from the prof due to the misunderstanding, especially if you band together (not in an angry horde sort of way to begin with lol) with your classmates.