Despite a few flaws, “Rabbit Hole”, starring Nicole Kidman and Aaron Eckhart, provides an excellent portrayal of grief. The stars’ characters, Leah and Howie, play a married couple who lost their 4-year old son to a car accident eight months prior. All of the emotions of grief — shock, sadness, anger, guilt/blame, regret — are enacted by the main characters, as well as by Leah’s mother (Dianne Wiest), and the teenage boy who caused the accident, swerving to avoid the family’s dog, and killing Leah and Howie’s son, who ran into the road after the dog.