My buddy and fellow skeptical photographer, Scott Hurst, sent this along.
I see physics. And I see pain. But mostly... WOW! It's 5:38 of your life you can't get back. Trust me; you'll be OK with that by the end of the clip. Don't forget to breathe!
If the video embed above doesn't work for you, click here. I hope to see more from master Danny MacAskill.
UPDATE: No, I couldn't leave "well-enough" alone. You know how I am. Here's a worksheet you can use as a classroom lesson to accompany the video clip. Can you write a better one? Of course! If you teach physics, you'll be keen to generate some estimation-based calculations. So have at it. Think of my lesson as a mere introduction to the video.