You know I want to, but I'm desperately frightened by SWMBO (she who must be obeyed) Here's the last break I ever did, twenty years ago. Get in a Zen push up position, have someone stack some cement on your back, and let someone break with a sledge. And, yes, my feet should be together on the Zen pushup, I was cheating in practice for balance. It was for a demo show we did for some kids in rehab. They seemed to enjoy it. We brought a lot of easy to break boards and they went nuts breaking them.