Quote from Ted in The Stinsons
Barney: What could you possibly have to say for yourself? [flashback to Ted and Margaret talking about acting tips:] Margaret: Acting rule number one: "Don't be afraid to improvise." [present:] Ted: Was it me who betrayed you, or you who betrayed me? Barney: I'm sorry. What? [flashback:] Margaret: Acting rule number five: "Invent a rich back story for your character." [present:] Ted: November 14th, 1998. The overnight train to Monte Carlo. I was in the billiards car hustling some Algerians out of few thousand dinar, when you seduced my fiancee! Who is blind and thought you were me. Margaret: Yes. Barney: What in God's name are you talking about? [flashback:] Margaret: Acting rule number eight: Don't be afraid to get physical. [present:] Ted: [slaps Barney] You know damn well what I'm talking about! Barney: No, I don't! Ted: [slaps Barney again] Yes, you do! And by God, I'll hear you say it, scoundrel!