I'm Cathy, an MSer and a producer of Hidden, I worked on Hidden with a focus from development to edit on the representation of MS and its symptoms.
One of the ideas I had early on generated from my own feelings of being newly diagnosed in an urban environment, was the feeling of the hostility of cityscapes that seemed pretty ordinary before. That's where the idea of the oppressive never-ending staircase came from! Many staircases have felt like that to me. Streets and stairs, estates, can suddenly disable you when you develop MS symptoms and that can be so disorientating. Likewise the door and lift scene also came from experiences of muscle weakness and lack of coordination I've experienced.
I was wondering if anyone else had ever felt like this?