Isaacson: That was one of the things that most surprised me, is, I didn’t realize what a hands-on manufacturing engineer he was, that he walks the assembly lines, be it at Tesla or SpaceX every day and says, “Ok, why is this screw being turned this way? Or why is this moving so slowly?” And [he] even can rewrite the code to get it done. When the engineers, they say, “We don’t know how to change it, we don’t have the” ... and I think that example, if I remember correctly, is typical because then he cranks it up to 80% and it doesn’t work and it, like, screws up, and so then he has to dial it back a little bit. But he says unless you push too hard, too fast, and sometimes blow things up, you’re not going to get it to the right speed.