(..) Sheldon, there's a diploma in my office that says I have a master's in engineering. And you also have a note from your mother that says, "I love you, Bubula. " But neither of those is a cogent argument for titanium over nanotubes. - Sheldon. - Yes? Go away. Did Leonard tell you to say that? (..)

(..) So it's a shelf. No, you don't understand. During acceleration, it needs to stay perfectly level and provide- Yeah, okay, it's a shelf. I notice you're using titanium. Did you give any consideration to carbon nanotubes? They're lighter, cheaper and have twice the tensile strength. (..)