The weird thing about this is the only person arguing Tony had some deep motivation when he spoke the line is...you. I think it was just the character being glib and throwing something in the villain’s face, something the character routinely did over the course of his life. You think he was reaching back to some moment that happened once years ago, in some effort to wink at the audience he doesn’t know is there, as well as the audience around him that wouldn’t know what the fuck he’s talking about in that current moment. But yeah, I’m the one trying to ascribe more to the moment than there is. You’re not very bright, are you?