There's a certain scene toward the end that always gets me these days.
No... not that one.
Well, yes... that one, too. That one comes later, though.
"I Love You." "I Know."
The romantic leadup between Han and Leia is fantastic in this movie. They start with the angry sniping, and... well... they sniping at each other for most of the rest of the movie, but once they reach Cloud City, it's apparent how much the duo care about and trust each other.
...then they open the door and Darth Vader ruins everything. Cue torture, bounty hunters, and general Empire related mayhem (they are striking back, after all).
Han's quote as he's being lowered into the carbonite chamber could come off as a sort of cocky acknowledgement, but Harrison Ford's delivery is perfect (in a sort of cheesy way, but such is the greatness of Star Wars and space operas in general). Of course he knows. We all do. We have all along.