A group of medical students were touring a mental hospital but one of the students was making rude comments about the patients and the hospital. Part way through the tour, the student asked the doctor, "so are all these people loonies then?"
"Only those who fail the test", responded the doctor. Now intrigued, the student asked "what is the test?"
"Well, we show them a bath full of water, a bucket, a jug and an egg-cup, we then ask them the quickest way to empty the bath" said the doctor.
"Oh that's simple", guessed the student, "the normal ones know its the bucket, right?"
"No actually, the normal ones say pull out the plug, let me see if I can find you a room".