@ TZ Well, I could not find any description or video on-line... only the etiquette about how to carry an open umbrella seems to be widely described -and while that is something a lot of people should look into it just isn't what need to know as it's basically just applied common sense.
It's extremely rude to bump another pedestrian's open umbrella. The French seem to have mastered the art of close-order umbrella drill.
“All the universe or nothingness. Which shall it be, Passworthy? Which shall it be?”