Uh, sarcasm ≠ irony. Sarcasm = sarcasm. Irony = unintended consequences. Like, attempting to escape your fate of killing your father and fucking your mother by running away, then discovering years later that you have, in fact, killed your father and boned mommy. For instance. There's plenty of irony in this movie (for example, the quite wealthy Michael Moore bemoaning capitalism, despite the fact that his film is only distributed to big, corporate theaters), but what you're talking about it most def. sarcasm.