Better Watch Out

Superb inversion of the usual babysitter in peril tale that strongly invokes Home Alone, but does so for a fantastic payoff. It's also one of those films that you should know as little about as possible when viewing, so if you are going to watch it then don't watch the trailer, don't look at that poster and don't read anything about it, in fact you should stop reading this now.
If you are not going to watch it, wrong - go back to the start and try again.