Cute little shocker, is quite illogical to conclusion

Basically, a mixture of "Butterfly Effect" and some similar movies with calls from the past, but is always illogical towards the end. Oh yes, a word here on technology from Amazon: is "Trailer" just from the first three minutes of the film, and that too completely silent and without sound track: The.

== SPOILER WARNING! ==

Why can Marys mother to it that the little Mary apparently also after the fact with the frying fat is allowed to continue to a total stranger? Why Rose apparently has a clean bill of health, that no one exploits them rum ever suspected and not one of their murders will ever discovered? How can a 70 year old still be so agile that they hacked loose doors and windows, as if it were Jack Torrance from "The Shining" (1980)?

Above all, Mary could have rausholen a much better end: Instead of trying to kill Rose, so to let pass the existing plot and make them even angrier, she could start rose on her former friend and current Stalker. If the had never existed, they would probably never drawn into the apartment and Rose had a / s other / s need to find a friend / in to play. In most cases, they would be more likely to be killed than her former husband, as it was the case in the original timeline.