[Dwight notices Pam repeatedly clicking on her mouse and Jim doing the same with a pen]
Dwight K. Schrute: Stop it!
Jim: Stop what?
Dwight K. Schrute: You're talking about me in Morse Code. Well, you know what? Joke's on you 'cause I know Morse Code. Ha!
Jim: [chuckles] Yeah. That's what we're doing. In our very limited free time and with our very limited budget, we went and got a nanny and then we went out and took a class on a very outmoded and very unnecessary form of communication just so we could talk about you in front of you.
[aside to camera:]
Jim: Yup. That's exactly what we did.
Pam: It all started when Dwight was tapping his foot against the leg of his desk. When I asked him to stop, he said, "I will when you lose the baby weight."
[back:]
Dwight K. Schrute: Very well. I must have imagined it. I apologize. [Pam clicks her stapler and Jim responds by tapping his keyboard rhythmically] Detonator. Detonator where? Michael!
Michael Scott: Jim. Are you clicking a detonator?
Jim: It's a pen.
Dwight K. Schrute: Michael, come on.
Michael Scott: Get back to work, Dwight. Please.
Dwight K. Schrute: Fine. Hey. Tap away. [After Dwight puts noise-cancelling headphones on, Pam and Jim start to blink in rhythm]