Little Johnny at it again. 

A new teacher was trying to make use of her psychology courses. She  started her class by saying, "Everyone who thinks they're stupid, stand  up!" 
After a few seconds, Little Johnny stood up.
The teacher said, "Do you think you're stupid, Little Johnny?" 
"No, ma'am, but I hate to see you standing there all by yourself!"

 

I just had to share that one!