No, not the lie itself. Of course I understand *why* he lied. But he still crossed a line by *lying at all*, because we've seen him promise (more than once) that he will never lie to Lana. Their relationship has been based on honesty (they've both craved it and insisted upon it with each other) so it's HUGE that Lex told an enormous lie, and that he did it with a smile of his face. He didn't even *consider* telling the truth, and normally Lex does. The vision profoundly affected him, I think, and the lie to Lana confirms that he embraced it. So good. It totally made the episode.