Robert Downey Jr. Shows Up When Terminally Ill Boy Asks Iron Man for Help

A terminally ill boy put out a heartbreaking plea for help to his favorite superhero. Aaron Hunter, 8, suffers from ROHHAD, a rare condition that causes children to rapidly gain weight and develop breathing problems. There is no cure and not much awareness for it since only about 100 people worldwide have the disease. So, Aaron called on his favorite Avenger, Iron Man, and the actor who plays him answered.'s Mara Montalbano ( has more.