my first math midterm freshman year was when I discovered that sleep deprivation, caffeine, and codeine don't mix. Had a bad cough, so the student health center gave me codeine as a cough suppressant. I'd crammed for the test, chugged some coffee, and proceeded to take my diff-EQ test. About 1.5 questions in, I start to realize that, in "A Beautiful Mind" fashion, the numbers were starting to highlight themselves and come off the page. Got a 94--highest grade in the class and my first and only A in math in college.
completely irrelevent, but always a great story.