Quote from Future Ted in Last Cigarette Ever
Robin: I'm gonna go up on the roof and stand there by myself for five minutes.
Ted: Have fun.
Future Ted: [v.o.] And that's exactly what she did. She just stood there. All right, kids, I'm gonna level with you. That's not what she did. Here's what she did.
Robin: All right, all right. I'm going to go have a cigarette.
Son & Daughter: What?
Future Ted: I promised her I'd never tell you this, but once upon a time, your Aunt Robin did enjoy the occasional cigarette, and occasionally that occasional cigarette was more than just occasional.