Take Ryan Reynolds, one coffin, a cell phone and a rusty Zippo. Add a talented Spanish director. Subtract 4lbs of bodyweight. Presto, you've got the unique cinema-going experience that is Buried, the most claustrophobic experience the movies can offer short of cramming yourself into your popcorn box. Eager to find out more, we chatted to said Spaniard, Rodrigo Cortés, to find out how his subterranean thriller came into being.