it's hard to pick one gem out of this frigging jewelry store of a movie. I guess I'd go with Jesco telling his wife he was going to kill her if she didn't stop making those greasy, slimy eggs and started frying them up a little bit better.
I also found the part where they go to Minnesota to meet the White that has it good and is successful, only to find he is still basically the same kind of person just located a couple of states to the North.