It's a sculpture. It's a toy. It's just deathly fun to play with.
Please note, the version in the video is a little different from the one you'll get when you order. I had to make the coils a little thicker so the springyness will be a little stiffer.
For an alternative version that stretches side to side, please go here: https://www.shapeways.com/model/2902966/
please note: the skull's flexibility might mean that it get's shipped in a "squished" shape. If this happens the skull might need to be squished in the opposite direction and held for a few minutes to get it's shape back where it should be.