If I was the instructor, I would give you guys the gnarliest, most difficult exam evar. I would also insist that all students stay until the end of the period.
At the end of the testing period, I would announce to the class: "LOL JK ROFL" and tear them up right infront of them

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"Your beauty is an aeroplane;
so high, my heart cannot bear the strain." -A.C. Jobim, Triste