A Rocket Versus a Freight Train

"i'm feeling that thing where my brain opens to new possibilities and new under just new questions i couldn't have asked an hour ago, or questions i would've even thought to have ask an hour ago," he says. "So a rocket verses a freight train, a rocket that doesn't liquefy the passengers versus a freight train. There are very different reasons for that incredibly slow acceleration." He adds: "We've got to think about that curve and calculate what's going to work on that curve"