The film tells the story of a hero who dressed up as a mental patient in order to win the Pulitzer news prize and enters a mental hospital to investigate real cases of mental illness.
Marge is put under a lot of stress with all of her responsibilities, which include solving the problems of the rest of the family. She gradually is negatively affected by all the stress and ultimately reaches her tipping point, causing her to put herself and Maggie in danger. Her handling of the situation suggests she has poor stress management skills.
Penelope is under a lot of stress when she meets Schneider. They have a conversation, and Schneider notices that she doesn't sound like herself. Penelope takes out her aggrevation on him.