Of course it is normal if the building has not been stripped to its bones beforehand. Where on earth would you expect the material to go? You think it would evaporate and disappear into thin air do you?
Sorry Oxy- you are just digging a deeper hole and exposing your..er...lack of knowledge...regarding typical building implosions.
Building implosions are designed so that the material is collapsed in on itself- creating as small a debris field as possible.
They do not have large parts of the facade of the building, the steel infrastructure ejected out in a massive EXplosion scattering debris for blocks.
Of course, you completely ignored the questions:
Can you show ANY controlled demolition that looks even remotely like this?
Can you show Any demolition that has material exploding up and outward?
If its normal you will be able to show similar examples.