Marshall: She did it!
Ted: Good for her.
Lily: [raspy voice] We're not going to smoke.
Barney: ... I have a pack stashed up on the roof.
[later, on the roof, as Robin climbs up:]
Ted: Uh-oh.
Barney: Uh, I'm awake. And I'm smoking! Robin, you know how dangerous it is to wake a sleep-smoker? Dear God.