As a documentarian, there's always a mixture of empathy and sheer gratitude for the privilege to be there. You earn these moments. And I remember in my last film 'THIN', there's a devastating scene at the end where one of the characters, Molly, purges. I never thought I would ever film somebody purging, but it turned out to be important for the film and for that illness. So on one hand it's the horror of what's happening, and on the other hand you're just grateful to be there and that they're comfortable letting you film.