The Bathtub Test

I don't usually do this thing. Copy & paste, but since it is from my mail inbox. Here it is..

During a visit to the mental hospital, I asked the Director 'How do you determine whether or not a patient should be admitted to the hospital.'
'Well,' said the Director, 'we fill up a bathtub, then we give a teaspoon, a teacup and a bucket to the patient and ask him to empty the bathtub.'

'Oh, I understand,' I said. 'A normal person would use the bucket because it's bigger than the spoon or the teacup.'

'No.' said the Director, 'A normal person would pull the drain plug. Well....... Do you want a bed near the window?'