I watched the Butterfly Effect with Ashton Kutcher (Demi Moore's toy boy and 'Dude Where's my car' star) and Amy Smart (Road Trip hottie).
It was a great film, and Kutcher was his annoying self like he was in Dude Where's my car or 'The 70s Show'. It's basically about going back and changing time and seeing the different routes through life that it caused for various characters. Being a big fan of 'Back to the Future' trilogy, this was a great film for me!
I would recommend it to anyone, it's not the kind of film you'd pick up in the video store but definately worth a watch. Gets you thinking afterwards to - about your own life and the route you've taken and things that might have changed your current status if you had made a different decision!