Maybe that was his way of coping with the loss of his wife.
Dean left the cell confident that the old man was coping, but he was beginning to mirror Fred's concern with his past.
As long as these coping mechanisms are done in a private place and don't do any damage to property, it's fine to express these feelings and may even provide you with a feeling of release.
While it's clear to see that stress and its physical effects upon the body are wide and varied, most emotional wellness studies agree on the methods of coping with this phenomenon.
Review your success in saving and paying off debt, and you will start to feel less stressed about money and coping with financial stress will become easier.