That IS cool! At 0:14, it looks like a single Prusik knot of some sort (???) It needs to be fairly loose on the ridgeline so it can slide, but with SOME grip so it won't slide back on it own, right? What knot would you use? (Can you tell I'm all over this idea? I'm doing it for sure!)
Mountains have a dreamy way
Surely, God could have made a better way to sleep.
Of folding up a noisy day
In quiet covers, cool and gray.
---Leigh Buckner Hanes
Surely, God never did.