I suppose that every time there is difficulty. I remember about Space Mountain: It took us ten years before we found the technology that would allow such a ride. And during these ten years I had a model that I kept waiting for the technology we needed.
I remember my first test in F1. After five laps I came back to the pits and tried to play it cool - 'Oh yeah I'm fine I'm on top of this' - but I was completely lost.
