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.
from: http://itspronouncedguy-care.tumblr.com/post/49118079020
from: http://itspronouncedguy-care.tumblr.com/post/49118079020