What do you learn from that test? I'm sure there's something, but it's beyond me.
It's like bicycle helmet.
It might help, unless you go more than 4mph.
Don't fly your jet into a concrete wall.
It's a demonstration of the strength of the wall. The wall being of the same stuff they make nuclear reactor buildings out of.
@ started
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What do you learn from that test? I'm sure there's something, but it's beyond me.