Dentist: I'm sorry, madam, but I'll have to charge you twenty-five dollars for pulling your son's tooth.
  Mother: Twenty-five dollars! But I thought you only charged five dollars for an extraction.
  Dentist: I usually do. But your son yelled so loud, he scared four other patients out of the office.
  Mother: Twenty-five dollars! But I thought you only charged five dollars for an extraction.
  Dentist: I usually do. But your son yelled so loud, he scared four other patients out of the office.