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It's a liquid that comes with a certain presure out of the pipe. Through the camera with around 24 pictures per second, you can't see flow. You can create the same effect with a stroboscope.
not correct, it also looks like this with your eyes. It's not relying on frame rates of cameras :-)
I was wrong with that, I confused it with another phenomenon. I'm sorry.
it is called laminar flow, google it and youtube it, so nice to look at it.
mfw nobody answered "nerve gas"
#11 Ouch