No matter how long the slinky is, the bottom of the slinky will stay still (hover) until the top reaches it. Even if the slinky is over 1000 feet long.

WHAT?!

The shit

Well, there is no fun in making sence, am i right? :3

it is because the top of the slinky is pulling the bottom of the slinky up at the same rate the bottom is being pulled down. if you have a more powerful spring it may even pull the bottom up while the top races down for it.