A very shy guy goes into a nightclub and sees a beautiful woman sitting at the bar. After an hour of gathering up his courage, he finally goes over to her and asks, tentatively, "Um, would you mind if I chatted with you for a while?"
She responds by yelling, at the top of her lungs, "No, I won't sleep with you tonight!" Everyone in the bar is now staring at them. Naturally, the guy is completely embarrassed and he slinks back to his table.
After a few minutes, the woman walks over to him and apologizes. She smiles at him and says, "I'm sorry if I embarrassed you. You see, I'm a graduate student in psychology and I'm studying how people respond to embarrassing situations."
To which he responds, at the top of his lungs, "Two-hundred dollars? What do you mean $200?!
A general noticed one of his soldiers behaving oddly. The soldier would pick up any piece of paper he found, frown and say: "That's not it" and put it down again. This went on for some time, until the general arranged to have the soldier psychologically tested. The psychologist concluded that the soldier was deranged, and wrote out his discharge from the army.
The soldier picked it up, smiled and said: "That's it."
The psychology teacher had just finished a lecture on mental health and had proceeded to give an oral quiz to the students. Speaking specifically about manic depression, the teacher asked, "How would you diagnose a patient who walks back and forth screaming at the top of his lungs one minute, then sits in a chair weeping uncontrollably the next?"
A young man in the rear of the room raised his hand and answered, "A basketball coach?"