Henley: In some cases, you’ll want an arm to rotate what it’s gripping—
Anataeus (Student): You mean, as opposed to the arm itself rotating.
Henley: That’s right. In those cases, you’ll use pivot instructions.

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Anataeus (Student): All very straightforward and simple.
Henley: How nice that this is so easy for you.
Anataeus (Student): Why, how long did it take _you_ to learn all this?
Henley: Let’s just keep going.