Barney: And if anything didn't go according to plan, they would freak out.
[flashback to Barney and Robin in Marshall and Lily's apartment:]
Lily: What do you mean, the egg timer is broken? What are we going to use for charades, sweetie?
Marshall: I'm working on it, darling. Okay? Just stall them.
Lily: Now, Robin, you work in television. We're experiencing some technical difficulties. [laughs] You get that? So, we're still laughing. Right? Laugh, Marshall.
[Lily and Marshall laugh]