(Music) (Music ends) Now, what happened was not maybe what you thought, which is, he suddenly became passionate, engaged, involved, got a new teacher, he hit puberty, or whatever it is. What actually happened was the impulses were reduced. You see, the first time, he was playing with an impulse on every note. (Music) And the second, with an impulse every other note. (Music) You can see it by looking at my head. (Laughter) The nine-year-old put an impulse on every four notes. (Music) The 10-year-old, on every eight notes.