But you'd have little control over where debris landed, and could end up killing spectators and destroying or damaging nearby buildings, resulting in severe jail time for yourself and bankruptcy for your demolition firm. Notice the phrase 'controlled demolition'.
Why do you keep posting this garbage? You know how stupid it is.
You let the upper section (1/5) fall down on the section below (4/5). Then you need the TNT just to control, where the debris lands?
Interesting new, innovative demolition idea.