Okay, we have thirty floors coming down on one, then 31 coming down on 69, 32 coming down on 68...
Almost immediately you have one third of the whole structure coming down on one floor at a time, that floor collapsing, and coming down on the next.
You say it couldn’t happen. It did. Twice.
It cannot happen at freefall speed. I did not say the floors did not come down, obviously they did. We have the video! But I can understand why folks need to phrase things incorrectly so they can be comfy refuting their own mistake.