doubleofive said:
xhonzi said:

Lando: Oh. When was that?
Vader: Back when I owned R2-D2 and Chewie and I used to hang.
Vader (to Chewie): What is up, my man?
Chewie: Rawagagraarar.
"Also, I've had to stop this bounty hunter here from killing me multiple times. And I built that protocol droid."

So many things happen on Cloud City that it must inherently contain some sort of cosmic significance. Almost as if it were the junction point for the entire space-time continuum. On the other hand, it could just be an amazing coincidence.