The Internet has many features: sometimes it can shock, amuse and frustrate its users. In this brief overview we are going to deal with neither standard computer defects nor with hackers and computer viruses. These phenomena can hardly be called the mysteries of the worldwide web. They are caused by certain people and therefore can be easily explained. For a long time computer viruses are known to be written either by teenagers willing to increase their self-esteem or by produces of anti-virus software programs intending to improve sales. A small fraction of special service employees and criminals creating similar "phenomena" are not going to be the subject of this overview either.The facts I am going to dwell on are cited in Russian and foreign authoritative websites and the press.A certain Ezhi Kovalsky, taxi-driver from Warsaw, received the e-mail message warning him to insure his apartment against fire which is going to happen there soon. рhe taxi-driver did not trust the message much and thought it was an advertising trick of an insurance company. However, he could not figure out the name of the company because the e-mail was signed by . him. Ezhi hesitated, but finally visited the nearest insurance company and signed the contract. Two weeks later he thanked his well-wishing twin and his own foresight because his apartment was damaged because of the fire in his neighbors" place, but his losses were covered by the insurance company.