Out now on DVD is The Exam (IFC Films), a fascinating, cleverly contained thriller of eight people brought into a windowless room with an armed guard and given 80 minutes to complete an exam. Unfortunately the piece of paper in front of them is blank and there are strict rules that can get people eliminated. Director Stuart Hazeldine's clever puzzle is taut and suspenseful and with a satisfying resolve. A stand out is Luke Mably (28 Days Later) as the brash troublemaker. All in all, the film is a very intelligent little mystery.