Less effective is the scene that inevitably ends Sarah’s vacation with Cal.
Really? I was on the edge of my seat throughout. It looks like Daniel is a mean sob, and it's not much of a surprise really.
Sarah had been lulled into a false sense of security thinking she was safe. The wakeup had to be brutal. You can see here what she's ready to do for her daughter.
And the other car isn't random. Watch it again, and you'll see Daniel is looking at Sarah and talking to her, but Sarah is clearly looking to ther right and sees the truck coming in. She drove straight through an intersection on purpose.