You know the dream.
You are back in school and you suddenly realize that the final exam for your English. Math or whatever class is today and you are freaking our because you have not attended that class for months. It somehow slipped your mind.
I have that dream and another where I'm back in the Army. That one is not stressful at all but the test one is always "How could I have forgotten to attend a class for months?"
And that produces a question: I knew some guys who didn't attend class for months and who would just show up for the final.
Do you think they have a dream in which they've been attending class?