Lily: Are you out of your mind? You knew they were playing relationship chicken, and what did you do? You put an engagement ring in front of them. Okay. That's it. I'm taking over. I'm coming out of retirement for one last breakup.
Ted: Yes!
Marshall: All right. How are we gonna do it?
Lily: These guys are in so deep just one fight ain't gonna do it. We need to reignite the four biggest fights they've ever been in, all at once. Number one, the battle of the dirty dishes. [flashback to fight] Number two, the ex-girlfriend conflict. Number three, the Star Wars altercation. And of course, the biggie, the Canadian-American war.