If i drop a Slinky you probably won’t be able to see it what happens, as it happens to fast. In Slow motion you can see the results, but maybe not understand what you saw.
You can see with the slow motion that the bottom end stayed completely still after I let go of the top and waited until the whole shiny came down until the it started to fall.
The bottom end has gravity pulling it down and tension pulling it up. Equal and opposite forces, then when the top of the slimy reaches the bottom there is no more tension pulling and gravity takes over and the bottom starts to fall.
The bottom does not even know that the top has been let go until it reaches the bottom.