Today has been quite a long day. I've spent almost all of it participating in a workshop on Transition Towns, which was rather amazing. Unfortunately it was a very big emotional, mental and temporal commitment, and I am going to need some time to gather my thoughts on this movement and how happy and excited that it's found its way to Pittsburgh; hopefully it will be a successful model for a large city, and it can spread its way through the United States. This has left me feeling quite happy.
So, in the meantime, I leave you with this: an amazing Primal workout.
You have it all: sprinting, proprioception, a jumping/power generation component. Even develops pain tolerance, landing skills (never know when you're going to slip/trip/fall-through-rickety-old-stairs)... Hell, it's even a group exercise with a healthy dose of competition!
I would say I'd feel "don't try this at home" was appropriate, but that would be lying.