Conspiracy theory: that incident was on purpose to generate massive PR.
Argument: seriously, how hard would it be to rehearse that thing so that it does not happen live twice?
Argument: seriously, how hard would it be to rehearse that thing so that it does not happen live twice?
For example, Duralex drinking glasses, which are made from tempered glass, dropped on a hard floor have a habit of bouncing once and exploding on the second impact (cause: https://en.m.wikipedia.org/wiki/Spontaneous_glass_breakage. Classical example: https://en.wikipedia.org/wiki/Prince_Rupert's_drop)
These windows could have a similar weakness, being fine on x huge impacts, to shatter on a relatively weak later impact.
I don't think anyone should have realistic expectations of the outer layer of glass not shattering. That is why there are multiple layers. If you threw a big metal ball really hard at the president's limo, it would likely crack the outer layer as well in similar ways. What fundamentally controls the strength of armored glass is how many layers you have.
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"... threw a big metal ball really hard at the president's limo ..."
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