Harry Potter and the Half-Blood Prince (novel)/Awesome


 * In both the movie and the book, you have the scene in the cave. Dumbledore is babbling incoherently while Harry is trying to fight off the Inferi that are swarming the small island. Just as Harry is about to be killed, Dumbledore gets himself an Heroic Second Wind, stands up, and unleashes an epic Kill It With Fire spell that starts vaporizing the Inferi and clears the path to the boat and then back to shore.
 * Snape versus Harry at the end of the book. To steal a line from Spoony, "You must admit, he shows great restraint in not backhanding the little pissant's teeth out."