Now, I'll be the first person to defend the vision of the artist, even at the expense of practicality, and normally I'd be on the other side of this argument, but seriously, Calatrava is being ridiculous. If people are slipping, falling, and breaking bones because of your pedestrian bridge? I suggest you rethink your holier-than-thou stance on your Great Masterpiece. It sounds to me as if it'd be like a virtual water slide in the rain. A pedestrian bridge has basically only one single function: that you be able to walk on it. If it doesn't satisfy even that requirement, what's the point?