. (punct.) - grammatical breath
Like real breath, you can use it less often as would be sensible, but you appear slightly breathless without
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Meatspace Twitter: you may talk about whatever you want, but only use half a lungful of air.
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Real world implementation: Poetry slam with helium balloon for each speaker on the mic. Once the helium voice runs out, their turn is over.
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Cheaters have been known to train at home to be able to fake helium voices while talking with normal air.
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One variation uses xenon and turns the speaker upside down for safety reasons since xenon is heavier than air and else won't exit the lung.
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