She was aware that things could go wrong. In fact, she had trained her entire life in anticipation that things would go wrong one day. She had quiet confidence as she started to see that this was the day that all her training would be worthwhile and useful. At this point, she had no idea just how wrong everything would go that day.

So does that mean that in the cities of the future we'll need about a third of the cars that we have now?

Preparation meets opportunity - a powerful moment of realization.