this post was submitted on 30 Sep 2024
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Today I Learned (TIL)
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FTA: There is risk of a crush when crowd density exceeds about five people per square meter.[a] For a person in a crowd a signal of danger, and a warning to get out of the crowd if possible, is the sensation of being touched on all four sides. A later, more serious, warning is when one feels shock waves travelling through the crowd, due to people at the back pushing forward against people at the front with nowhere to go.
The Women's March in 2017 felt like a dangerous situation crowd-wise. Luckily cops are nice to white ladies and the Proud Boys hadn't started violently attacking everyone they hate, so it was fine.
I'm hoping we don't all have to mobilize again post-election, but if we do, I'll listen to my bad feeling and get out of crowds that are touching on all sides.