I've watched this twice now, as the first time, I kept thinking, "All of these 911 calls are recorded, and he's breaking a lot of rules". After you watch the ending, you realize what kind of person Joe is, and why he might throw caution to the wayside. His story is tragic and relatable to many, and the twist in the movie was something I suspected, but still was pretty shocked. It was a really well-made movie, captivating, and suspenseful. A little dramatic as to how 911 call centers are, but it's Hollywood. Really good movie that's definitely worth a watch.