The one who taught he wasn't retarded

In a mental hospital, a doctor is doing his monthly checkup on the patients. Upon entering a room full of patients, he decided to conduct a test to see if a patient was now normal. So, he drew a door on the chalkboard and said, "Whoever can get out this door first, we'll be free to go home." The patients quickly ran to the board and all bumped into it. The doctor then noticed one patient who was left behind and was just sitting down and laughing. The doctor asked, "Why didn't you run for the door? you must be normal now." The patient continued laughing and said,"Stupid retards,of course they can't open the door, The key is with me." LOL!