Marc Forster, director of last week's Monster's Ball, shot this earlier film, his first on digital video. In style and content, it's not an easy ride. It often looks and sounds awful - grainy, fuzzy, ill-focused, full of collateral noise. No way a clear-cut narrative. Yet rough looks suit a tough subject: cot deaths, or, as the US calls this still mysterious phenomenon, "Sudden Infant Death Syndrome" (SIDS).