Cool and gripping teen thriller It's rare for a thriller to live up to its billing these days but this one certainly does. Sandra Bullock does a pretty good job of her role, as always, but it is the two young male leads who really steal the film - in particular Ryan Gosling as Richard. He manages to make the character menacing and almost maniacal, whilst still being charming and sexy at the same time. What makes the film a winner, in my view, is that we already know "whodunnit" before we even start watching it, so there is none of that predictability, and guessing the ending which comes with so many films of this genre. Instead we get to watch a game of cat and mouse, a pitting of wits between the detective and the two killers. It manages to keep the pace going until the very end, and doesn't ever lose it's way. An easy 9 out of 10.