If there's anything I've learned over the past ten years that is most important, it's this: The Mythbusters are awesome.
I saw Adam and Jaime at Comic Con a few years back, and they were great. Then a couple years ago I saw Adam Savage driving in his Prius in San Francisco while I was driving my Prius. We had a Prius Parade, and it was beautiful.
I used to show an episode in class. The junior Mythbusters test whether Benjamin Franklin really completed his key and lightening experiment. My favorite part about the episode is that Adam and Jamie test fart myths. It was perfect for eighth grade.