[flashback to Nora and Barney out on the street:]
Nora: Here we are. I had a really great time tonight.
Barney: Yeah, me, too.
Nora: Do you want to come upstairs?
Barney: I'd love to. There's just one little thing, and it probably doesn't matter, but... I don't want to get married. I've been saying that all night just to get in your pants.
[Nora slaps Barney]
Barney: Whoa!
[present, in the doctor's office:]
[Lily slaps Barney]
Barney: Oh! Ahh! Can you believe...
[Dr. Kirby slaps Barney]