This is simply astonishing. Watch twenty seconds and you'll be sucked into the world of Usman Riaz, an immensely talented 23-year-old Pakistani musician who will change your perception of how a guitar can sound and be played. What's more remarkable is that this Berklee College of Music whiz kid learned much of his dazzling guitar technique by watching YouTube videos at 16. He also learned what he calls "parlor tricks," like body percussion and harmonica. But the classically trained pianist also used the Internet to learn how to write and conduct orchestra pieces and make films.