A friend of mine took an exam in his French class while on acid once. When friends asked him about it later, he said, "I think I did pretty well. I wrote this great story about a thunderstorm."     The professor called him into his office soon afterwards and showed him the test. It was a piece of paper covered with the words "Noir noir noir, noir BLANC!!! noir noir noir noir noir, noir noir noir BLANC!!!" over and over.