Are You Stupid?
A new teacher was trying to make use of her psychology courses.
She started her class by saying, "Everyone who thinks they are stupid, stand up!"
After a few seconds, little Johnny stood up. The teacher was surprised, but realized this was an opportune moment to help a child.
"Do you really think you're stupid, Johnny?" she asked.
"No, ma'am," Johnny replied, "but I hated to see you standing there all by yourself!"