Joke or anecdote. At university a lecture on psychology begins. A professor set comfortably behind the pulpit and begen : - Today, comrades, we will study three similar stages of the human psyche: surprise, irritation and anger. Consider a specific example ... The professor taking out the phone from the briefcase and dials the first number that he finds. - Hello, could I speak with Vasia? - I think you got the wrong number,... “There's it”, the professor says with a smiling, “This is just a slight surprise.” Let's move on. Dials the number again. - Hello, Vasya did not come? - I have said , you won't find his here ... Rubbing his hands, the professor winks conspiratorially at the audience. - We got him. Well, now ... The professor a third time dials the number. - So,Vasia is not here? - #### ### ...(Slams Down Handset) - Well, comrades, I hope you understand the example. Let's start the theoretical part ... A young man from the first desk comes to the professor. “Excuse me, professor, but you forgot the fourth stage.” - Yes, what about it? - The stage of to drive one crazy. Taking the professor's phone, the young man dials the number. - Good day. This is Vasia. Nobody called me?