h a l f b a k e r yWe got your practicality ... right here.
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(Old joke) Japanese man on train has the technology you describe. Explains it to intrigued westerner. 10 mins later, starts talking without raising hand. Explains 'That 10 minute ago Japan technology. New technology - silicon chip in lip, silicon chip in ear.' |
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Not recommended for divers. Signalling "OK" will just put
you into a feedback loop that will ultrasonically kill anything
in a 5 metre radius |
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