The video, the final one in a six-part series about the Slinky, puts a new twist on the classic toy, which was developed by a U.S. naval mechanical engineer in the early 1940s.

Drop a Slinky and you’d expect it to just plummet. You’d be wrong. What really happens surprised even Derek Muller, with a Ph.D in physics and a raging curiosity about how things work ...

In case you need a reminder: The Slinky is made of metal with a 2.75-inch diameter, and it's incredibly versatile. You can put one end in each hand and "slink" it back and forth for a quick work ...