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How Crowds Can Kill You?
This doesn't mean you should stop going to concerts.
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Key Facts In This Video
A high density crowd is defined as a crowd where there are 6 or more people per square meter. At that concentration, people in the crowd begin to lose the ability to move on their own accord, and the crowd tends to behave a lot like a fluid. 00:47
If the crowd is packed tightly enough, you can lose the ability to inflate your lungs. Suffocating in this way is known as "crowd crush." "Progressive crowd collapse" happens when one person falls, leading other people to fall in a domino effect that ends up crushing those on the bottom of the pile of fallen people. 01:08
It's a misconception that people most often die in crowds due to mass panics and stampedes. The fact is that if you have enough room to run over your fellow humans in a stampede, those people probably have enough room to get out of the way. Likewise, very rarely do crowds experience mass panic and move in a panicked way. You can suffocate from crowd crush in a very calm crowd. 02:42
How Do The Media Estimate Crowd Sizes?
You can't just look at a rally and easily guess.