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A diver makes underwater vortex rings that can knock over rocks

And here I thought this was just an animated gif, but no, via Daily Picks & Flicks, there’s a video of a diver making a bubble ring or vortex ring, above.

A vortex ring is the phenomenon where a quantity of fluid or gas in a toroid (donut) shape, travels through a medium of fluid or gas, while spinning like a thick circular bracelet that is being rolled off of a person’s arm. (Except the spin is in the opposite direction as when a bracelet is rolled off in this way.)

And evidently there are a series of videos from this diver. Here are two more:

Are these videos real? Yes, we’re pretty sure they are. So how exactly is this done? A small burst of air is released into a toroidal or poloidal vortex, essentially a spinning donut of water. 

Bubble rings are actually made of two different rings, one inside the other, spinning in the same direction. The outer ring is made of water, and the inner one is made of air… 

From YouTube User Maxwel Hohn, How to make a horizontal bubble ring:

Just remember to always be safe when underwater. Please conduct all experiments with adult supervision. 

Related watching: make your own underwater vortex ring generator, make a homemade vortex cannon, or the viral video of cetaceans blowing bubble rings.

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