Quote from Barney in Milk
Marshall: That is sick! Why would you do that?
Barney: Who knows? This feud goes so far back I can't remember who fired the first shot.
Marshall: Well, look, if you would just... help me fill out these forms, that would be great. [off Barney's look] What?
Barney: Butterfield is going to retaliate within the next four hours. That's been his pattern. This is war, Eriksen. I need you to clear your schedule, call Lily, tell her you'll be home late.