You shouldn't do things without your doctor's permission.
Jim recently had an operation and was ordered by his doctor to avoid anything vigorous for a few weeks.
Jim wants to do something fun today.
Jim follow his doctor's orders and spends the day reading a new book on the sofa.
Jim decides to go on an intense run through the park despite his doctor's orders.
Jim thoroughly enjoys the novel, and his body has a chance to heal.
Jim has a heart attack from the strain and dies on the spot.