George Clooney's veteran astronaut becomes untethered from his space station in the first poster for director Alfonso Cuarón's thriller Gravity. Clooney stars as Matt Kowalsky, who, along with Dr. Ryan Stone (Sandra Bullock), a first-time space traveler, becomes lost on a seemingly routine mission that sees their shuttle being destroyed and their chances for survival non-existent. Check it out as Kowalsky loses his grip high above the earth's atmosphere.