I don't normally review, but felt compelled to do so having read so many 1 star reviews. Of course everyone is entitled to their own opinion. Mine is that this was the most tense I can ever remember watching a movie. Cast was excellent, story telling compelling . Sure the dialogue could have been crisper. I don't know how realistic it is or claims to be. But as a warning of what 18 minutes of panic might look like it was absolutely on point for Halloween season!