I'm probably going to get a lot of grief for this, but I was personally scared witless. Right from the get-go, from the terrifying opening I wasn't expecting to the chilling ending, the suspense kicks in and doesn't let up. Though it was fairly easy to predict who was going to die and who wasn't, it didn't make the deaths any less scarier or shocking. The story is simple enough: Jill Johnson is your every-day, average sixteen-year-old girl going through a rough time with her friend and boyfriend which caused her to go so far over her cell phone minutes that her parents grounded her for a month, taking away her cell phone and her car. She must pay them back by babysitting for Dr. Mandrakis and his wife at their enormous hill-set home. When she arrives it's obvious that it will be an easy night: the kids are already asleep and she has access to everything that the house has to offer, including a well-stocked fridge, TV and stereo, and a koi pond/aviary in the middle of the house. However, it isn't long before the phone calls start. Sometimes it's just heavy breathing, sometimes it's a little talking, but they don't last for more than a few seconds. Jill finally gets exasperated and calls the police, but calms down when she realizes that the family's maid is still in the house. However, when the caller asks, "Have you checked the children?" Jill gets annoyed and treks upstairs to find the kids safe in their bed. It's not until two seconds later that the phone rings asking, "How were the children?" that Jill really starts to freak out. The twist about the caller is revealed in the trailer, but it doesn't take from the suspense at all. A feature that the house has is motion-sensitive lights, which turn on upon entry in the room. I thought this would take away from the suspense because you'd know where someone was at all times, but it doesn't at all, and is in fact used in one extremely suspenseful scene very masterfully. All in all, I thought the movie was very well made, and I will definitely go see it again. I highly recommend it, if you can let go of the improbable premise, which maybe isn't so improbable after all...