TIL there's a growing body of literature showing that your performance in a range of cognitive and motor tasks seems to improve when immersed chest-deep in water e.g.http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0202284 …
Looking at the references there is more research into this so perhaps I should look there but I'm too busy to get sucked in. 
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More here for an overview https://en.m.wikipedia.org/wiki/Diving_reflex …
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Maybe no water got on their faces though.

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Anyway, they should mention Archimedes at least!
End of conversation
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