Quote from Marshall in The Fight
Marshall: Dude, listen to me, please, trust me, I've been in plenty of fights. It's... really nothing to be proud of. Ted: Who did you get in a fight with? Marshall: My brothers. Robin: [laughs] Barney: Yes, I'm sure that was quite a rumble in the Eriksen rumpus room. [flashback to Marshall and his brothers rough housing] Barney: Oh, cocoa break!