It’s called a Laminar Flow. Water usually has a lot of turbulence in it, and that is that causes it to look rather chaotic when it’s spraying out of a hose.
Laminar Flow occurs when all the water is moving in the exact same direction, eliminating turbulence, and thus, creating a flow of water that looks like glass.
Still, the idea that this is creating Laminar flow randomly is quite incredible, usually it requires specially built nozzles to create it.
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