'Gravity' Trailer: George Clooney and Sandra Bullock Are Lost in Space (Video)

The sci-fi film from "Children of Men" director Alfonso Cuaron hits theaters Oct. 4.

It's just Sandra Bullock and a space suit for much of the first trailer for Gravity.

The sci-fi pic centers on two astronauts, played by Bullock and George Clooney, who are set adrift after their space station is damaged.

"Grab ahold. Grab anything," Clooney's character yells when things get bad.

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The word "claustrophobic" comes to mind to describe the trailer, though that's not quite right since much of it shows Dr. Stone (Bullock) alone in open space.

The Warner Bros. film from director Alfonso Cuaron (Children of Men) hits theaters Oct. 4 and will be released in
3-D and in IMAX. Cuaron wrote the script with his son, Jonas.