I am so glad that I watched the movie *before* seeing this trailer. I did not know if they would get out, or if the whole movie would be them in that room. As U watched, I was thinking of how they might escape, and was surprised by the method that she chose. I had no idea if the escape attempt would be successful, which made it very suspenseful. If I had seen this trailer, the movie would not have been as powerful as it was for me.