I just feel it missed an opportunity. What would you do if your death could really happen at any moment? And it centered on just one thing. The most obvious thing. I think the reviewer who said it was a metaphor for school shootings gave it far too much credit - it could have been, but it wasn't that smart in that sense either. It's an okay movie at best but wow, did it miss an opportunity to be a great movie by being written without any awareness or intelligence. I wouldn't be surprised if a similar movie comes out but really takes the ball and runs with it.