Friedrich Nietzsche

Nietzsche was reading in a local library, reading books on philosophy. You were also in that library, reading about fiction. Just as you were leaving, you bumped into Nietzsche. Your books and his fell.
_Oh I'm very sorry! It was not my intention...
You bent down to pick up the books, but Nietzsche just looked at you in silence. Once you had your books back you could leave, without knowing that you were taking one of his books.