Abstract: The Queen's question “Why did no one see it coming” provoked professional economists as well. A fierce discussion arose how to modify and improve theory and models. A survey of the literature reveals that almost a hundred analyses warned against the instability of several mechanism, be it bubbles, oversupply of funds, financial innovations, behaviour of financial institutions or regulation. Most observers predicted a recession, nobody a worldwide crisis. The crisis arose as all these mechanisms worked together and produced a surprise. Surprises appear to be the central elements of deep financial crises. Therefore the chances are odd for forecasting.