"In the astronaut business - the shuttle is a very complicated vehicle; it's the most complicated flying machine ever built. And in the astronaut business, we have a saying, which is, 'There is no problem so bad that you can't make it worse.'"

"The International Space Station is a phenomenal laboratory, an unparalleled test bed for new invention and discovery. Yet I often thought, while silently gazing out the window at Earth, that the actual legacy of humanity's attempts to step into space will be a better understanding of our current planet and how to take care of it."

"Almost everything worthwhile carries with it some sort of risk, whether it's starting a new business, whether it's leaving home, whether it's getting married, or whether it's flying in space."

"Some of the greatest reality television we ever had was the moon landings. When you think about it, that was human emotion and people, unscripted, working with each other - and millions and millions of people around the world, glued to their television sets to share real-time in a brand new, fascinating human experience."

"I get criticized for taking roles in films like 'Ghost Rider 2', but if you look at my resume, dude, I've mixed it up as much as I can."

"Have you ever noticed what golf spells backwards?"

"As long as I can remember, I wanted to be a writer."

"I don't really enjoy watching reality TV."