Which Sequel Is Actually Better Than The Original?

Yes, it actually happens sometimes. Every once in a blue moon, a sequel comes along that kicks the pants off the original work. This happens in movies, but also in books, graphic novels and television shows. What's your favorite sequel that puts the first installment to shame?

Please include a picture, clip, book cover or poster for your chosen sequel. And please mention the name, and what it was a sequel to (if it's not obvious), and why it's better than the first helping. Thanks!

Top image: Star Trek II: The Wrath of Khan, the definitive example of a sequel that kicked the original's butt.