What’s the third sentence in a conversation that always surprises you?

I’ve been thinking about how often the third sentence—usually just filler, right?—ends up being the one that reveals something real. Like when someone says, 'The coffee’s cold,' and then, after a pause, 'I didn’t sleep much last night.' Not dramatic, not planned. Just… there. I keep wondering if that’s where truth lives: not in the big confessions, but in the quiet stumble between what you meant to say and what actually comes out.