[flashback, as Marshall explains the hole in the wall:]
Lily: That's it, Robin. Give me the stick.
Robin: I'll give you summer teeth. Some are here, some are there.
Lily: Robin, give me the stick.
Robin: Take off, hoser.
Lily: That's it!
[Lily and Robin start fighting]
Robin: Scrap?! I'll scrap!
Ted: Guys, come on!
Barney: For America.
Ted: All right, break it, break it up!
Barney: Ted, no! You never break up a girl fight! Never!
[Barney punches the wall]
Ted: Entirely Barney's fault. As, by the way, is the big scorch mark over the fireplace.