I’ve mentioned this bizarre-seeming effect in which a Slinky seems to defy gravity. It doesn’t, of course, it just takes a finite time for the “fact” that the top is no longer supported to reach the bottom and the whole spring to hit the deck. Researcher discusses it in terms of information and signals, which it is, but it is simply that the upper part of the spring is still suspending the lower part until the kinetic energy generated from the potential energy of suspension in a gravitational field reaches the lower part.