If you weren't already freaked the eff out by the two teaser trailers for Alfonso Cuarón's space thriller "Gravity" — an intentionally ironic name, since the whole movie's about being helpless in zero grav — here's a full-length trailer that's ought to do the trick.

Opening with some shivery statistics on just how gloomy the landscape of this movie is ("At 372 miles above Earth there is nothing to carry sound. No air pressure. No oxygen. Life in space is impossible"), this new trailer focuses less on George Clooney's seasoned space vet Matt Kowalsky, save for that oh-so-soothing voice of his, and puts more emphasis on Sandra Bullock's noob Dr. Ryan Stone. The lady does seem to get the s**t end of the space stick as she's left careening into endless nothingness after their ship starts to disintegrate.

To top off all the stomach-churning moments, the new vid also gives us a little somethin' somethin' from Dr. Stone's past. "I had a daughter," she says to Kowalsky, her new makeshift survival coach. "A little girl with brown hair. Tell her that I'm not quitting." Notice the "had" there and prepare for some sads with that personal history, k?

On a happier note, Cuarón's gotten himself some pretty high praise for his space thriller ... and from a guy who knows what he's talking about, too.

James Cameron, of "Aliens" and "Avatar" space cred, raved about the movie to Variety, saying he was "stunned, absolutely floored" by the pic and now regards it to be "the best space photography ever done." Hell, he even went so far as to call it "the best space film ever done" and "the movie [he's] been hungry to see for an awful long time."

But Cuarón wasn't the only one on the receiving end of Cam-Cam's praises. Nope. America's Sweetheart herself also impressed with her turn as the doomed doc. Cameron called her performance "an absolutely seamless portrayal of a woman fighting for her life in zero gravity."

Finally, a 20-minute preview of the film's harrowing soundtrack by Steven Price is now available for listening, but do be warned that it's just as tragic as you might expect. If you need a good cry at your desk, you know what to do.

"Gravity" hits theaters on Oct. 4.