Extremely dumb characters doing very stupid things almost from the very beginning of the movie to nearly its last seconds. Every single one of them. Almost everything they do. I mean, how come "heroine" keeps secrets from everyone all the time for no reason at all then decides to tell the truth when asked about where the key to the car was at the end of the movie when she could've bought time because the idiot "villain" nailed the only person that could show him where the key is to the wall. That is just one example.