I mentioned a couple weeks ago my stopper knot got caught in a branch fork when I dropped a limb, and I couldn't free it from the tree. I was on a moving rope(arbormaster), and me pulling on the lanyard trying to get it out was causing my hitch(5 wrap michoacán with 10mm Flex) to slip. I'm about 240# geared up, then whatever force I was adding by pulling the lanyard; maybe 150#.
That episode got my attention. It wasn't a big deal, but with different circumstances, it could be a big deal. I've switched to a single overhand as a stopper to keep it smaller, and I'm considering a constrictor to make it a pseudo sewn eye splice to make it smaller yet, but that makes it harder to switch ends on the fly. I always have a fixed blade knife on me that's very fast to deploy, but that only works if you have time to deploy it. Lesson learned... Mind where your tail is on all lines.