It seems that there is confusion between drop and contact.
An object drops due to gravity. But it doesn't contact another object due to gravity! It contacts the other object as it happens to be in the way.
It seems also my previous experiments (Pizza Boxes, Bathroom Scale) are too difficult to execute for JREF posters and that, regardless, many persons do not understand the objective of the experiments and the results, i.e. that a smaller object dropping on a bigger object (both objects have same structure, unit weights, etc) will not destroy the bigger object.
All you need is 11 match boxes of exactly the same type (structure, unit weight, etc). Pls don't play with the matches. Keep them inside the boxes.
Start of experiment
You put 10 match boxes and put them on top of one another on a table. That is the bigger object/lower structure - quite similar to WTC1, actually.
Execution of experiment
Now, drop the 11th match box on this bigger object. The 11th match box is the upper part of WTC1 allegedly dropping down. You can chose the height of drop; the height of a match box, or whatever. Gravity will take care of the drop. The bigger object will take care of the contact as it is in the way!
Result
What is the result? Does the 11th match box destroy, one after the other, the 10 match boxes constituting the bigger object/lower structure in a 'global collapse'?
Evidently not! I hope everybody agrees!
Analysis
So why doesn't the 11th match box destroy the 10 boxes below.
Aha, lack of energy! Lack of speed?
And that's what should have happened to WTC1 on 9/11 IF the upper part actually dropped, which it didn't as no drop is seen on any video.
Conclusion
A smaller object cannot destroy a bigger object when dropping on it, when both objects have same structure and unit weight.
Exercise for advanced scientists
Explain why the 11th match box cannot destroy the 10 boxes below using simple language and correct assumptions and proper physics.
PS
Do not assume that the 11th match box is rigid and has the mass of a bowling ball. The 11th match box is not rigid and has the mass 1/10th of the lower object.
Good luck!
Anybody that can prove that the 11th match box can destroy the 10 other boxes only with assistance of gravity in a global collapse will get a prize!