very nice!! id love to see it as like a heavy pipe, swinging on chains, and a pad or two for head and sides
Haha, I love the taped on training shoe, so life like, have you considered letting kids to throw rock at you, it's great for build reactions and movement[/QUOTE
That's a fine suggestion.
However, any compensation for work performed constitutes labor; and child labor is met with harsh fines and other penalties. Also, as per our environmentalist lobby; any changes to the landscape requires a permit. More extreme environmentalists would picket and complain about ignoring how the rock migh feel; being used that way.
In the end, it is simply easier to use a device like the one above.