Obviously if metagaming (players using information their characters don't have) is a problem, you can only do it in the most innocuous instances. But if you can trust the people you play with to be cool and honest, you've got more options. In general I find that metagaming to a limited extent actually helps roleplaying exceptionally wise or intelligent characters.
You could also do the cut scene as a foreboding redherring. Something audiances are familiar with anyway, the players that go off the deepend based on information there characters don't have, deserve what they get, and it might make for greater drama. Establishing a little bit of a character flaw for the heroes might make their stuggle better.
Although the players who would take bait like that, are also the ones who'd get all hot and bothered about being "cheated" in some fashion. Typically they'll, in some fashion, indicate that they consider themselves an "advanced roleplayer."