The thought of being ditched at sea isn't as terrible as being left behind in space. At least when you compare the trailers for Open Water and Alfonso Cuarón's latest, Gravity. The synopsis for this space odyssey goes something like this:

Dr. Ryan Stone (Sandra Bullock) is a brilliant medical engineer on her first shuttle mission, with veteran astronaut Matt Kowalsky (George Clooney). But on a seemingly routine spacewalk, disaster strikes. The shuttle is destroyed, leaving Stone and Kowalsky completely alone—tethered to nothing but each other and spiraling out into the blackness. The deafening silence tells them they have lost any link to Earth...and any chance for rescue. As fear turns to panic, every gulp of air eats away at what little oxygen is left. But the only way home may be to go further out into the terrifying expanse of space.

Will love keep our space walkers alive? Maybe aliens. A blackhole perhaps. In any event, the film opens with a continuous 17-minute shot. And if this trailer is any indication of what we can expect from Cuarón's follow up to Children of Men, then we're in for one effing amazing ride. Gravity hits theaters October 4.