When you have that window of opportunity called a crisis, move as quickly as you can, get as much done as you can. There's a momentum for change that's very compelling.
Momentum may take some time to initiate and build, but once you've got it going, it will carry you and your business far. To build momentum, you've got to know when to hit the gas and when to apply the brakes. You've also got to know when to deploy the supplemental resources, usually people and capital, necessary to accelerate momentum in your organization.
Momentum is powerful. It can be hard to create, and if not caught early, difficult to stop. You can observe momentum just about anywhere, and it can be positive and constructive, or ugly and ...