There once was a man who was on his way to work when suddenly one of the front tires of his car blew out. Remembering he had a spare tire in the trunk, he pulled to the side of the road and changed the tire. While changing the tire, the lube slipped out of his sight and rolled down the road. He panicked, "Oh God, what am I going to do now?"
Across the street was a red brick building who housed mentally ill patients. A young man who was sweeping the front entrance to the building shouted, "Excuse me sir, it looks like you need some help over there. Do you mind if I offer a hand?"
The man who owned the car said, "Young man, I appreciate the offer, however, I don't know if you can offer me a hand. You see, I was changing the tire on my car and the lube on my tire rolled down the street and I cannot find it."
The young man said, "Sir, all you have to do is take the lube from one of the other tires and put it on the spare tire and that will hold you up until you find an auto shop." The older man looked at him and said, "Wow! I didn't think of that! Thanks a lot."
Then he stopped for a moment, looked at the young man and then at the building he lived in and said, "Wait a minute. How did you know what to tell me to do with my car? You live in the building across the street. You are supposed to be insane."
The man smiled, took a drag of his cigarette, and replied, "Just because I'm supposed to be insane don't mean I'm a jackass."