Still don't know the answer

I was dreaming that I was in Dr. Neville Brooke's Pharmacology class, and he asked a question for us to answer, so this one girl started to say something, but then another girl was excited, and said, "Oh, yeah," and started to babble some incoherent answer, but then realized she still didn't know the answer, so the first girl started again, and then second girl did it again. Finally, it happened a third time, and the first girl who still knew the answer gave up with an exasperated roll of her eyes. Dr. Brookes looked at us, and I said, "So...I still don't know the answer." Everyone looked at each other, unsure what to do, and I got one of those quiet fits of laughter and my face turned red trying to control it, so then I woke up.