When I really enjoy a movie, I'll pull up a variety of websites and spend a few hours researching its creation, the time and effort involved, and, in the case of this movie, the true story behind it all. In the course of this research I came across the movie poster, which I had never before seen.
This is it:
What I love so much about the design in this poster is that the canyon walls create an hourglass, which I didn't immediately notice. The gradient, from a peaceful blue at the top, to a dangerous red at the bottom, tells you that as time passes, Aron experiences a descent from a harmless weekend of fun into a life-threatening nightmare. It's not often that you see meaningful, well constructed design in a movie poster nowadays. It made me appreciate the movie even more.
If you haven't seen it yet, you must.