I like to feel the butterflies in the stomach, I like to go home and have a restless night and wonder how I'm going to be able to accomplish this feat, get jittery. That hunger and those butterflies in the stomach are very essential for all creative people.
Our three big emergencies are fire, loss of pressurization or contaminated atmosphere. Any of those things in a spaceship are very deadly and time critical. Everybody's trained, but I'm the commander of the ship, and it's up to me to decide.