Context
Example 1:
At eight-thirty it is time for breakfast and Jane is wheeled down to the cafeteria, whereupon she is spoon-fed by yet another unfamiliar face. The meal has been pureed and does not appear very appetizing. Jane begins to cry. Eventually she no longer responds to food and is wheeled back to the nurse's station. While there, she sits next to other residents even though she is completely oblivious of their existence. Once again Jane begins to cry as she mumbles words that do not make any sense.
When the audience is non-academic or in a humanities field, like English or Sociology, which accepts personal experience as a field of knowledge, this is an appropriate introduction, however, it would be a poor one in a scientific field.