It's disappointing that you can't just be happy Tony takes the time to humor the utterly unsupported explosiveless "collapse" premise to debate the characteristics of such a scenario, and instead are compelled to rant at me for having no interest in doing the same. Besides, the only time I even used the term "rigid" on this forum is in the illustration I presented previously, so I'm left to wonder where you are getting your "you ride me all the time about it" complaint from. Perhaps you've confused me with someone else?
That said, it seems you never actually understood my point about calculating PE, so I'll try a different example, with two identical upper masses with identical center of mass heights, and the only difference being orientation:
Surely you can see that while the upper mass might pulverize the lower mass in scenario A, that doesn't necessarily mean the upper mass in B will inflict any damage at all?