This amazed me.
I'll admit, I'm horribly afraid of heights so this is something I could never, never, ever (did I mention never, ever?) do. Ever. I'm in awe of people who can do these sorts of things because they have to have nerves of steel, incredible patience and absolutely no fear of anything.
I think what got me the most was the guy walking on the bare rail.
I don't know who filmed the video or any other particulars about it and the site linked to from You Tube is in Japanese. If anyone has any info on this at all, please do post about it in the comments. I'd love to know more about it!
It's simply amazing.