Signs of the times (again)

I came across this photo in the course of my Web peregrinations.

I like it because, like the mobile art I shared yesterday, it raises so many questions in me.

How many people have gone up to test the edges? How many every day? Do they have to wash off the blood weekly, or do they just let the rain do that?

And what the hell is up with the “no car” icon in the lower right side? (Yes, of course it could be Photoshopped. But I still wonder about the car.)