Quote from Barney in Ted Mosby, Architect
Future Ted: [v.o.] Kids, sometimes your relationship goes so smoothly for so long that you think it will be that way forever. It never is. [at MacLaren's] Ted: Well, we just had our first fight. [at a nail salon:] Robin: We had our first fight. Lily: [concerned] Oh, no. What did you fight about? [back at MacLaren's:] Barney: Oh, no, what'd you fight about? [puts on headphones]