Five minutes into this movie and I was already hoping for a slow and painful death for the younger sister. Talk about BRAT! The older sister seemed to be intelligent, until she ends up driving in a "road" that is all a pile of dirt, that couldn't possibly be a real road to anywhere in the planet. Of course they get a flat tire??? How? Last I heard mud is not that sharp. To be honest, I decided to read reviews, glad I did. Younger sister vomiting on her older sister, (she didn't want to vomit on the floor???), is what I felt of doing although I don't have a sister. Needless to say, I was not about to continue with this waste of time.