A few climbers in this area have over the years used a short loop of light line as a "cuttable link" in certain situations. For example if you're wrecking out a tree that is of questionable integrity whilst you are hanging out of another tree or two nearby. If the tree starts failing while you're on it, it is easier to slice through the light line and not be dragged down with it.
This all started when we were hired to cull the trees that were a hazard in a forest with horse trails throughout. I was working for a friend at that time. He was topping out large branches in a 100+ foot tree before dropping the pole. He was using a wire-core lanyard which he had placed below the branch he was removing, made his undercut, and before he could even start the back cut the branch tore loose. Turns out the twist of the grain was such that the fibers at his undercut (about two feet out on the 22" diameter branch) twisted around in just two feet of distance and were the holding fibers at the top, right next to the trunk. As it ripped free the upper fibers ran down the stem about 10 feet, pulling him into the stub. He was sore for about two weeks with a lot of abdominal bruising. Ever since he will only use a lanyard if it has a cuttable link.