And for me this was strange - can a spring from another car really do this to a bone in my head?

One day, Richard saw one of these springs fall off his desk. It rolled over itself in the most fascinating way.

Also, if I have a larger bubble wrap sheet, there will be more "springs" next to each other to push up on the weights.

A foreign material may have contaminated some valve springs in the manufacture of the sedans, which are produced in Japan.

Inside are tiny "springs" made of carbon nanotubes - minuscule hair-like filaments - that can "sense" pressure from a slight pinch up to the equivalent of two elephants stepping on top of the sensor.