If every human on earth held their breath for ten seconds what would happen?

P.S. And what is the equation to figuring this out? or:P.S. And what is the equation to figuring this out?or:Every human on earth would of held their

P.S. And what is the equation to figuring this out?

or:P.S. And what is the equation to figuring this out?

or:Every human on earth would of held their breath?

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