Slinky can do more than just walk down the stairs.
What happens when you hold the top of a stretched out Slinky and drop it?
It's not intuitive.
What happens is it looks like magic.
Slow motion Slinky drop (5 videos in one)
Watch the first 15 seconds of this video
for the best slow motion Slinky drop
Found here: Holy Levitating Slinky, Kottke>>
Slinky image at Regretsy>>