"Most people find that that deepens. Becomes sort of polyphonic. Then there's a sense that it's going somewhere, that something will happen. Will change." She shrugs. "It's impossible to describe, but if you live with it for a while, it starts to get to you. It's just such a powerful effect, induced by so little actual screen time. I've never felt convinced that there's a recognized filmmaker around who can do that, although if you read the footage boards you'll see different directors constantly nominated."