While they don't come out and actually say it, the second trailer for Gravity features an indirect nod to the famous tagline for Ridley Scott's Alien: "In space, no one can hear you scream." That phrase is actually more relevant in Alfonso Cuarón's upcoming thriller, which stars Sandra Bullock and George Clooney as two astronauts who are lost in space after their shuttle is destroyed. If it couldn't get any worse than that, every breath they take consumes the little oxygen that is left. Watch as this determined astronaut does whatever she can to make it home to her daughter in this highly-anticipated film, in theaters October 4.