Stop surfing the web and go see Spellbound right now! It's a documentary about the U.S. national spelling bee competition, and if that doesn't sound like a recipe for fun, let me assure you that this movie is at different times hilarious, poignant, and masterfully depicts a cross-section of American culture. If that's not enough, it has plenty of near-unpronounceable words... AND an electric guitar Star-Spangled Banner solo!

If you're looking for more documentary recommendations, Kevin Kelly's True Films is a good place to start. One of my others is Dark Days, about the people who live in the train tunnels below Manhattan. It wonderfully humanizes a topic which at first can seem scary, and has a great soundtrack by DJ Shadow to boot.