If you are too young to remember these, we apologise in advance. Taking inspiration from boogie boards, we think, coiled legropes featured a spring like design, the theory being they offered the same flexibility and protection, yet at only a foot or so long, were much less cumbersome. That may be true, until the board was caught by a wave, and the leash suddenly became 23 feet long, before springing back at warped speed (with your board connected) to it’s usual size. They were both largely impractical and potentially deadly, a fun combination indeed.