I am not sure if many of you guys knew this but if you stand up straight for too long and lock your knees then your brain slowly start getting less and less blood until you faint. I never knew this but they tell you about it when you are in the Marine Corps and we have to stand in formations for a long time and stand at attention. Seriously I served for 4 years active duty and saw at least 15 Marines pass out in formation just like that girl did. So it can happen to anybody.
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