Trivia: Doug Ross frequently hung his head low, appearing ashamed or thoughtful or privately amused, depending on the scene. This wasn't just an element of the character: George Clooney had taken to writing his lines on papers, sheets, and other props.
Trivia: Every episode has the patient list by the nurse's station. On the patient list, different names are mentioned, like Marguiles or Tierney. They put these names there as a spoof of the show.
Answer: Take care of your dad.