Gravity, which stars Sandra Bullock  and George Clooney , took home the Oscar for visual effects this weekend, and it's not hard to see why. Most of the film was shot with techniques invented by director Alfonso Cuarón and his production team from scratch. In fact, 90 percent of this movie is computer generated! On Sunday, Gravity could take the top prizes for best cinematography, production design, and visual effects . . . Watch this episode of The Sync Up  to see why.