After the first grammar lesson of my Japanese an hilarious incident happened. One of my friend did something foolish, and another friend instead of saying "anata wa 'fool' desu", he said "watashi wa 'fool' desu". First we didnt realized but after few seconds of silence, when we readlised what he said, we all brust in to laughter..!!!!
But as Albert Einstine has said: If someone has never made a mistake, most probably he has not done anything...!!!!!