Para reiterar e expor o que foi dito: O objetivo era fazer com que Luke viesse para Cloud City e entrasse em uma armadilha. Se a visão de Luke era de que Han e Leia estavam se divertindo com o velho amigo de Han, por que Luke se sentiria obrigado a salvá-los? Então, quando Han diz
They never even asked me any questions
e Leia diz
Why are they doing this to us?
é porque Vader sabe que Luke não vai aparecer a menos que ele sinta que seus amigos ficarão com dor. Lucas explica isso no documentário Império dos Sonhos .
Página Legendas de Wookieepedia:
Three years after the Battle of Yavin, Darth Vader again tortured Leia Organa, as well as Han Solo and Chewbacca, on Cloud City. While the torture was not augmented by the Force, Vader knew that their anguish would reach Luke Skywalker through the Force and draw him to Bespin where he could be captured and delivered to Emperor Palpatine. Han was subjected to the scan grid, Chewie to sonic torture and searing lights. Leia, like Han, went through an ordeal with a torture machine, though the specific details are unknown.
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Página Canon do WookiePedia:
Darth Vader was adept at it: even as a Jedi, he Force choked Poggle the Lesser to gain information on killing the brain worms. He once tortured Han Solo so his pain would reverberate through the Force and draw out Luke Skywalker.
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Curiosamente, no rascunho original do roteiro de Leigh Brackett, Vader não tortura ninguém. De fato, Leia, Han, Chewie e Lando sentam-se à mesa e fazem uma refeição com Vader. Leia pergunta por que ele está sendo tão bom para ela em comparação com o tratamento que ela recebeu na Estrela da Morte, e Vader diz:
You’re forgetting something, Princess. When we entertained you aboard the Death Star, you had information that we needed. Now you have nothing.
Leia diz que ela não entende porque ele está lá se ele não quer nada com eles. Vader menciona Luke. Então esta troca acontece:
LEIA
But I don’t know where he is... or even if he’s still alive.
DARTH VADER
He’s alive. And he’ll find you, because he loves you.
HAN
That’s ridiculous. He could search for...
DARTH VADER
He’ll find her. And until then, we wait. I would advise you against any rash moves. I’ve set a guard on the Falcon so there’s no escape that way. I shan’t lock your doors unless you make it necessary.
LEIA
Luke hasn’t the faintest idea where we are. You must be out of your mind.
DARTH VADER
Then there’s no need to worry, is there?
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