Mielr said:

Just curious, Sky....how do you interpret the "I know" line? Funny, wistful, or...???? :-/

He is trying to be a pain in the ass even though he knows he may very well die here on Cloud City. I find it totally flippant and at the same time equally true to Han Solo's character as well as Harrison Ford.

First time i saw the movie i thought the line was funny and unscripted.

I honestly thought it was something that Lucas missed.

Though now i know Han is almost similarly flippant earlier in the movie but that most of those takes never made the finished cut. I mean in the ice corridor on Hoth.