The Heavy Gas Effect

The Heavy Gas Effect

Because you've probably seen those videos where people inhale helium, which makes their voices sound high-pitched and squeaky, because helium is lighter than air. But now imagine if you inhale a gas that's five times heavier than air, like sulfur hexafluoride.
Which is so heavy that when you pour it on burning candles, it instantly extinguishes their flame. And once when the judges of America's Got Talent tried it, their voices changed to this

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