A mental hospital was critically overcrowded. The doctor decides to
get all the patients seated in one large room to conduct a test to see
how many they discharge that day.

At the front of the room the Doctors took some chalk and drew a full
size door on a Blackboard and offered an ice cream to any patient who
could open the door.

There was a mad rush for the door with the patients scratching a
clawing at the door and the handle.

The doctors were disappointed, until they noticed a single patient who
remained in his chair and was quietly chuckling to himself as he
watched his fellow patients.

Encouraged that at least one patient could be discharged today, the
doctors asked him why he wasn't trying to open the door.

The patient, who could no longer contain his laughter, shouted, "I've
got the key!"

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