Admission in Ward 7

A Journalist to a Doctor of a mental hospital & the following conversation ensued:

JOURNALIST: How do you determine to admit a patient or not?
DOCTOR: Well, we first fill a bathtub with water till the top. We then give a teaspoon, a glass cup and a bucket to the patient and ask him/her to empty the bathtub.
JOURNALIST: Obviously a normal person would use the BUCKET because it's bigger.
DOCTOR: No, you're stupid! A normal person would pull the DRAIN PLUG! Nurse, admit this idiot in Ward 7!!!