Marshall: I can't believe that Robin puts up with that.
Barney: Oh, don't worry. She's got a great way to avoid fights, too.
[flashback to Robin talking to Barney as he eats breakfast in his apartment:]
Robin: Um, are ties machine-washable?
Barney: No, they most certainly are not. Why? What is in your hand? Oh, my God, what is in your hand?
[Robin unbuttons her top; present:]
Marshall: Okay, so you walk away, Robin gets naked. Those are the two stupidest ways to handle conflict I've ever heard.
Ted: Actually, the naked thing ain't bad. [high fives Barney] That felt kind of weird.