How is that possible?! How in the world is that possible?! Making an entire movie, with only one actor, in a one cubic meter coffin buried underground (repeat after me: How is that possible?!). Now that's what I call filmmaking. This a modern times Hitchcockian experience - a study in using the least elements possible, and appointing all other responsibilities to the viewer's imagination. A once in a lifetime event, never to be repeated in any movie again. And the ending will keep your mouth wide open. Claustrophobics beware.