[After Barney gets off the phone with Marshall, he trashes his own office:]
Robin: Oh, my God!
Barney: How long have you been there?
Robin: You don't remember?
[flashback to three minutes earlier:]
Robin: Hey. I was in the neighborhood. I just wanted to check in on you. You seemed, um, you seemed really upset the other day.
Barney: Oh, no, I'm fine.
Robin: Okay. Well, um, you want to go grab some lunch?
Barney: Sure. Hey, are you okay if I invite Marshall to join us?
Robin: Yeah.
[present:]
Barney: Right. So, um... Chinese?