Saving the world is no easy task, you might understand why in this new pic from "Mission: Impossible -- Ghost Protocol" everyone's upside down frown is upside down (think about it).

That's right, Tom Cruise is back as Ethan Hunt with Jeremy Renner as the new agent, Simon Pegg as the tech guru and Paula Patton as a young operative in the crew. And while we're not sure what's causing all the tense faces, the general rule is whoever smelt it, dealt it, but really somebody should just own up to doing it. Hey it's Friday, so we're allowed to make fart jokes okay? Deal. Anyway, it's another look at the film that is shaping up to be quite a promising bit of holiday season popcorn fare. And we're curious to see how Brad Bird fares with his first live-action blockbuster outside the comfort zone of the Pixar family.

Co-starring Josh Holloway, Ving Rhames, Michael Nyqvist, Anil Kapoor, Lea Seydoux and Vladimir Mashkov, 'Ghost Protocol' hits theaters on December 21st. [Tom Cruise]