Similarly for climbers: https://opp.uoregon.edu/climbing/topics/signals.html | Hacker News

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		genericone on Jan 20, 2019 \| parent \| context \| favorite \| on: Japan's Rail Workers Pointing at Things (2017) Similarly for climbers: https://opp.uoregon.edu/climbing/topics/signals.html

carlmr on Jan 21, 2019 [–]

True, didn't even think of it, I don't like climbing with people that don't do this.

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