I've told y'all before how I froze on one of those 'ropes' courses they have at kid's camp? I was supposed to walk across a beam, 50 feet above the ground, with a harness on, but nothing to hang on to. I couldn't even budge when they said I could scoot across it on my butt... I was scared to death. I finally did it, they wouldn't let us go back ;~D
The obstacle right before it was the same thing with a rope overhead to hang on to.... no trouble at all with that.
I don't blame you! I think I could do it, with a harness, but handrails add so much to your mental wellbeing.