Taking a loaded bar on your shoulders and going on a walk on a inclined tread mill.
It would probably mimic Grok very well. I would think walking this way for about 30minutes a day would be a great exercise.
I have been thinking about what to do about my squat. I don't have access to a squat cage and no companions, who train like me. I have been doing the steinborne lift. But that is difficult/dangerous to increase without a helper.
I am thinking this exercise although not as good as the squat will probably build a very strong core.
And it seems very near to primal life style, minus the tread mill part. But walking with a bar around your neighbourhood will look a bit insane ;-).