Iron Man 3 is a perfect example of how someone with PTSD behaves. Tony Stark (Robert Downey Jr.) suffers from PTSD because of the ordeals he faced in "The Avengers". PTSD can cause nightmares, and Tony suffers from nightmares almost every night, and since the Iron Man suit reacts to his heart rate, his suit almost kills hi fiance, Pepper Potts (Gwyneth Paltrow)