I was 14. We had to stand up in front of the class, the scariest thing I could think of at that age, and answer questions on how various words were formed, the things that form words in the English language, endings and beginnings of words. I got up in front of the class and froze up like a statue. I stood there for an eternity with everyone staring at me. I couldn't move or speak. I think it lasted for an hour, or felt like it.