Hardest Exam Question?

What’s the hardest exam question you ever faced in law school? Was there one so difficult it is seared into your memory?  One fiendish question I recall was on the final exam given by Judge Jay Plager in his Legislation class.  I don’t recall the precise substance, but it was immaterial.  There was a reasonably complex hypothetical fact pattern setting up  a legal dispute over the proper interpretation of a statute.  Question 1 asked us to take on the role of a judge hearing the case and to write the majority opinion.  Question 2 asked us the write the dissent.