Why are there so few examples of great crisis management?

When I ask most audiences to name a company that did a great job managing a crisis, most people (in Canada, anyway) say the name of one company: Maple Leaf Foods. I agree. They did a great job. But the real question is this...Why are there so few examples of excellent crisis management and so many instances of companies doing the wrong thing? The answer, in part, is human nature. That, and a lack of prep and planning.