Exhaling a breath he hadn't realised he was holding, Miles laughed nervously. "Of course you're not," he said, feeling uncharacteristically flustered, nearly tripping over his words. "But I suppose you get this enough to have understood who I meant? No offense, but the resemblance is striking."
So much so, that he had forgotten his manners, and was being perfectly rude. He was often rude, of course, but that was generally a deliberate action rather than an omission.