The Bad Astronomer is a never-ending fount of facts and funnies. He and I attended Michigan at the same time and had a friend in common, though we never met in Ann Arbor. Whenever you hear some wacko astronomy story in the news, proceed directly to www.BadAstronomy.com for the real story.
He's posted a note about World Jump Day. What, it wasn't on your calendar? C'mon, basic physics tells us that if we can get 600 million people to jump at the same time, we can move the earth into a different orbit. If coordinated correctly, we can move the earth farther from the sun and save ourselves from the fate that global warming has in store.
How many times do we see evidence that someone studied physics enough to learn of some classic problems or sketches of basic principles, but they didn't study thoroughly enough to internalize the solutions or consequences of the principles? Nevertheless, they go on to organize something like World Jump Day or design the next perpetual-motion machine.
Anyway, there's a hip lesson to be made from this kind of thing. A lesson that is especially groovy because it invokes real physics and throws in a splash of critical thinking as well.