Michael comes up with the perfect plan to increase customer numbers.
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The Office Season 5 Episode 19 Quotes

Dwight: Knock, knock.
Michael: Who's there?
Dwight: KGB.
Michael: KGB - [Dwight slaps Michael]
Dwight: [in Russian accent] We will ask the questions!

Dwight: What are you doing?
Michael: What are you doing?
Dwight: Hey! Hey! Stop it! Stop it!
Michael: You, you like that?
Dwight: C'mon. What are you doing? Mine was a part of my hilarious joke.
Michael: Mine was retribution. What are you doing? No more knock-knock jokes. That's it.
Jim: Ding Dong.
Michael: [to Jim] Who's there?
Jim: KGB.
Michael: Dwight, get the door.
Dwight: I'm not answering it.
Michael: Answer the door.
Jim: Ding dong.
Dwight: No way, it's the KGB.
Jim: Ding dong.
Dwight: I'm not answering that. You answer it.
Michael: I'm not gonna answer it
Dwight: I'm not gonna answer it, it's the KGB.
Jim: The KGB will wait for no one!
Dwight: It's true.