Thus we can see that, in reality, the energy of the falling upper section of the tower would not be utilised to crush only one storey of the tower, but would in fact be distributed throughout the upper section as well as storeys in the lower section. Energy would be absorbed over many more storeys than the first impacted storey of the lower section. This is both obvious and intuitive. In a collision, energy is dissipated in both the impacting and impacted objects in proportion to their relative strengths, characteristics and construction.
To give an easily visualised analogy, imagine a large truck parked with its rear end against a solid wall and a car accelerated headlong into the front of the truck. Many things may happen, but one possibility which can easily be ruled out is that the car will pass all of the way through the truck, suffering no damage as it totally destroys the truck, until such time as it strikes the wall, at which point it is itself destroyed. This scenario is precisely what Dr. Bazant would have us believe with his "crush down - crush up" theory.