Fearing she hasn't time to unlock the front door, Amy bolts for the back of the house. The KILLER has both hands wrapped around Lizzie's throat, but still manages to hip-check Amy as she runs by. Amy falls into a pool of blood left by Diana. She spies a large shard of glass on the ground and picks it up. Amy jams it into the KILLER's neck and he falls to one knee, releasing Lizzie in the process.
Amy grabs Lizzie, who is barely conscious and they stumble to the back door. It is locked, but Amy gets it open quickly and they go out into the yard. They run to the back fence and try to climb it, but it is too high.
Amy: Here, I'll give you a boost.
Lizzie: But, how are you going to get over?
Amy: Don't worry about that, just come on!
Amy bends down and links her hands together in front of her. Lizzie steps onto them and Amy lifts her onto the top of the fence. Lizzie gets her feet over and reaches down, grabbing Amy's hands and trying to pull her up, just as the KILLER arrives.