Test For Insanity

During a visit to the local mental institute, John asked the Director during a tour how to determine whether or not a patient should be institutionalized.
“It's simple actually,” said the Director
“We fill up a bathtub, then we offer a Teaspoon, a Teacup and a Bucket to the patient
We ask him or her to empty the bathtub.”
“Ohhhh, I understand
“Obviously a normal person would choose the bucket because it's bigger than the spoon or the teacup.”
“No
A normal person would pull the plug and let it drain
Do you want a bed near the window?”