That line Obi Wan told Qui Gon in Ep. 1 after dropping from an exhaust shaft inside the Trade Federation Ship in the beggining.
"You were right about one thing, Master..the negotiations were short."
I think it was intended as a joke. Or at least that's whats it seems Obi Wan tried to pass it off as a with that smirk that followed. Either I didn't get it or it was just plain not a funny joke.