This next picture shows the depth of the canyon near the place where he strung the cable:
Back when I was young, I could stand next to the edge without any fear at all. Not so, now that I am old.
Here he is part way through his daring walk:
That yellow thing hanging down from the cable must be used to try to stabilize the movement of the wire. I looked at other pictures that I didn't post that shows that they are about three or four feet long.
The huge size of the cable must have made it easier to walk on but how the heck did they get it strung from one side to the other?
Just looking at that last picture makes me dizzy. Oh, that's right, I am already Dizzy. So, choose a wide bridge to cross and have a great day, you hear?