Live and learn. Glad you weren't killedor maimed permanently. It's good to pass on this info so that others can learn from it. At least you were apparently wearing a safety harness. I have learned to not trust anything. Limbs, strap-on or screw-in steps. They can all fail. 3 point hookup is what I practice. Two ahd and one foot or two feet and one hand on something solid at all times. Don't rush the climb. You don't want it to be your last.