Steel spring of some sort inside a common rope.

Exciting!
-- RayfordSteele, Nov 06 2021

There might be some kind bi-metalic strip encased by the rope that can make it jerk into two positions. The batteries to power it would be contained within the handles at either end.
-- xenzag, Nov 06 2021


Really cool visual, Rayford.
-- blissmiss, Nov 09 2021



random, halfbakery