A vortex in my bucket

One of the taps in my bathroom at home issues water in laminar flow – without any turbulence. Sometimes the flow from the tap to the bucket looks like it's frozen: there are no disturbances on the water's surface to indicate that it is flowing through the air; the fact of the flow becomes evident only when it strikes the water already in the bucket.

https://videopress.com/v/VglzTG5X?resizeToParent=true&cover=true&useAverageColor=true

If the water in the bucket is otherwise still, i.e. undisturbed by any other jerking motion, the flow from the water seems to create a small depression when it strikes the surface, like a ball might create a depression when it lands on suspended fabric. But when I took a closer look, it was less a depression localised to the surface and more the origin of a vortex plunging into the water, like an underwater tornado!

https://videopress.com/v/ppmFXpQk?resizeToParent=true&cover=true&preloadContent=metadata&useAverageColor=true

When I closed this magic tap and opened the one next to it, it gushed a turbulent stream of water into the bucket. There were no vortices, or none that I could see. I remember learning in engineering college that turbulent flow is characterised by the production of many vortices that all interact with each other in a chaotic way, creating a drag force that impedes the fluid's smooth flow.

Where there is a vortex, there is or will be turbulence. In this case, the laminar flow from the tap could be transitioning to a turbulent state as it flows into the still water, until at the bottom of the vortex the flow dissipates completely. Such a lovely sight.