Oh, my gosh, the dancing on the side of the highway. A little bit before Before Adam Mitchel's daughter dies, she asks her dad to dance with her on the side of the road when her favorite song plays on the radio while they are driving. Adam declines because, well, it's kind of embarrassing. So, instead she teaches him how to dance for next time by acting like she is holding him as she dances. It's adorable, but the real heartwarmer is when a little after after she dies, Adam goes to the same spot on the side of the road and plays his daughter's favorite song and walks outside. He than starts dancing as a voice over of her teaching him to dance plays while he dances. Note that this was one of those dances that involve holding the other person. This troper needed a few tissues after that.
Also heartwarming is the dinner scene after the "Snake Kings" scene. The Mitchels are laughing happily when Adam says that he had a good day. In the quiet of his wife and son sobering, he states that they're going to be okay. Then his son says out of the blue "I wish I had been a better brother..." The three family members end up in a crying group hug as Adam reaffirms his love and care for his son and reassuring him that he's not to blame for anything involving his sister.