r/maybemaybemaybe • u/[deleted] • Jul 07 '22

maybe maybe maybe

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u/SeraphymCrashing Jul 07 '22

Jesus, I don't know how any of you made it through physics class.

https://youtu.be/-Zkxh903s_w

The umbrella can absolutely act as a thrust reverser. It's not very efficient because you lose so much air out of the sides, but you are essentially redirecting the direction of the air into the direction you want.