W Tell said:
You can't have an explosion without pressure buildup.
Err, say what? Explosions obviously don't require an air pressure buildup to happen.. but I'm guessing you probably just said it backwards. But I'm afraid you
can have an explosion without *significant* air pressure buildup. If there *is* a significant blast of air, it is most likely to be from a collapsing ceiling segment. There are also some, but not many, 'explosive' sources within buildings that might be responsible.. But even assuming that the conspiracy was true - any explosive that caused *that* was clearly a complete failure - such charges are extremely tightly directed and *very* unlikely to waste their energy blowing lots of air outwards...
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It's not air pressure from the collapse, that comes later.
That's just silly - the area is obviously suffering from a great deal of damage, there are fires blazing - collapsing walls and ceilings, or even combustible chemicals in, say a cleaning cupboard could be causing all sorts of effects and blowouts. What's more a bit of lateral thinking should tell you that with things like liftshafts and air con ducts, there are numerous connections between floors, and a presure buildup in some areas might take quite a convoluted path before finding the weakest escape point.
I'm sure you would rather dismiss such musings with simplistic one line claims that try to reduce very complex scenarios to little black and white cameos.. But that isn't how the real world works. And it's why armchair 'expert' pronoucements count for pretty much nuthin. Mine are equally valuable, of course, but I'll let the esteemed readers judge who has put a bit of thought into their work, and who hasn't..