Why couldn't they just get a hotel?
I don't understand why they would agree to stay in a dirty, dark bunker in the ground. You can't even get cellphone reception--what sort of teens can do without cellphones for even a day? Kiera's character would definitely not find such a rathole acceptable. And to allow someone to simply lock them in? That's just stupid.
So already I found this to be too incredible to accept, and the film just went downhill from there.