When you don't have anything to lose, you risk it all ... I mean that makes sense now doesn't it? While we all know we will eventually die, we don't really (like to) think too much about our mortality. So maybe you don't approve of the movie being so blunt and in your face. Not to mention violent and over the top of course.
Ben Foster plays it as straight as he can and he has the innocent looking Elle Fanning at his side. Anyone who has seen her in other roles already knows there is more to her though. In this case we get something I haven't yet seen from her: annoying screaming. It's her character of course, so don't get that mixed up. Thriller is quite nice to say the least, even it isn't everyones cup of tea