Lily: Hey, look at this one. This is the first picture the three of us ever took together.
Marshall: That's right. It was.
Ted: Hey, you remember how it happened?
[flashback to Ted and Marshall being photographed in their college dorm:]
Man: Okay, ready?
Ted: Wait, wait, wait. What pose should we do? Buddy cop picture?
Marshall: Oh, no, no. What about an '80s sitcom about two roommates who never agree on anything?
Ted: Mmm-hmm.
Man: Nice. Okay, one, two...
Lily: [knocks on door] Hi, Marshall. Ready for the movie?
Marshall: Um, yeah. Just a second, though, okay? We're about to make history. We're about to take our first ever roommate picture.
Ted: Yeah. Hey, why don't you get in the picture, too?
Lily: Really?
Ted: Yeah.
Marshall: Wait. What are you doing, Ted? What if we break up?
Ted: What if you don't?