Warner Bros. has released a new and more intense trailer for Gravity, a sci-fi drama from acclaimed director Alfonso Cuaron (Children of Men), starring Academy Award winners Sandra Bullock and George Clooney as astronauts drifting aimlessly through space after a routine spacewalk goes terribly wrong.

Bullock is Dr. Ryan Stone, a medical engineer whose first shuttle mission is with retiring astronaut Matt Kowalsky, played by Clooney. The trailer shows the disaster that separates the two and leads to what I’m hoping are Open Water-like thrills in space. Gravity opens Oct.4.

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