Ok, when Mark("Fed Ex")and Tom(his father) get off the train in Midland toward the end of the movie, the family meets them there. Kate(the mother) runs toward Mark and hugs him. You can see as she's going toward him that she has her sunglasses on her head. When she hugs him, her sunglasses like fall back down her hair to the back of her neck. The camera gets a different angled shot and the sunglasses are back on her head again. There's no way that could happen because she's hugging mark the whole time and she wouldn't be able to reach back and put them back on her head.