Wow. I once had a class, where the teacher said nothing, only, "why". It was cool, to see what each person conceived of the question. Some people thought of life, and others sports or hobbies. Pretty cool what one word can say XD!
>>6 I had a friend who's psychology teacher had a written test where all it asked was "why?". I never took psychology but I'm planning on it and I hope my teacher is as awesome as that.