Having spent the last few months working in the garden and working around the house using all sorts of ropes, strings, extension cords, and hoses, I can confirm that the "rope/cord/wire inevitably gets caught on object" is a very real phenomenon that is not restricted to trite scenes in movies.
For example, if I am working with an extension cord, I can count on that cord wrapping itself around a tree or piece of furniture. If I am working with a garden hose, that hose will ultimately get caught up on any and all nearby objects rather than effortlessly move across the lawn. And so on.
So, if you ever happen to find yourself falling off a cliff or skidding toward a gorge, do yourself a favor and grab the nearest rope or wire. You can be assured that the rope or wire will wrap itself around something and, ultimately, save your life.