The hum of the Earth. Russia

On the evening of October 12, 1980, thousands of people heard a sound similar to the wail of a siren. The sound came from somewhere in the north — from beyond the Volga. A faint dot appeared far on the horizon beyond the Volga.

The dot hung motionless in the sky for several minutes, and then, as if having made up its mind, it took off and quickly flew towards the city. During the flight, it transformed into a giant blue oval with a red nucleus in the middle. Having reached the zenith, the object froze over the heads of astonished citizens watching it from various streets of Cheboksary. Then it suddenly exploded with thousands of brilliant yellow sparks. Like the stars of a festive salute, sparks rained down on a suburban park located on the outskirts of the city.

A few days later, residents of houses on Pavlova Street near the park reported to the police that "devilry" had started in their houses. By themselves, the window panes opened at night, looking at the park. Returning home from work in the evening, some found a mess in their apartments - closets were open, clothes and dishes were lying on the floor, and it was as if someone had danced on the beds.

One pensioner decided to ambush the "hooligans". He was hiding on the landing near the door leading to his apartment. And when I heard that someone was wandering around the apartment outside the door and talking quietly there, I opened the door and rushed into the house. To his own surprise, he found no strangers in the house.

Soon the tricks of invisible pranksters began to occur in other multi-storey residential buildings of the city.