Marshall: I don't scream at Lily.
Lily: And I don't scream at my kids, none of whom have parents who work at Marshall's firm.
Robin: So it's not a circle.
Barney: Fine! You want it to be a chain of screaming, it's a chain of screaming. I came up with the circle idea halfway through, 'cause I thought it was a more elegant metaphor, but fine, ruin it! You guys always undermine me when I'm trying to make a point, and I'm sick of it! God, I'm surrounded by idiots! Idiots! See, doesn't everyone feel better now?