Seryozha, did you remember to close the windows?"

"

A young man lived with his parents in an old two-story Stalin-era building. They lived on the ground floor. Every door in the building was locked, even the interior ones. The boy (let's call him Seryozha) went to a dance that night, and his mother warned him: when he came back from dancing, he should close all the windows for the night. Probably to keep anyone from breaking in.

The boy danced his fill and came home late that night. He closed the windows, locked the door to his room, and went to bed. The house sank into the silence of the night, and Seryozha fell asleep. And then, on the brink of sleep and wakefulness (a borderline state), he heard a soft knock at the door and his mother's whisper:

"Seryozha, did you remember to close the windows?"

"Mom, everything's fine..." he mumbled.

 The knock on the door grew louder, and Mom spoke loudly:

"Seryozha, have you closed all the windows?" Her voice was so tense.

The boy, half asleep, said:

"Leave me alone, everything's locked."

A loud bang on the closed door and Mom's voice, high and panicked, said:

"Seryozha, open up! Open the door quickly!"

The boy, cursing, dragged himself to the door. He clearly saw the light under the door from the lightbulb in the next room. He saw the shadow of Mom's feet. He turned the lock, flung the door open, and... the deafening silence and darkness of the sleeping house descended upon him. There was no light, no movement anywhere.

"So what next?" we longed for the story to continue. The boy replied that nothing. He screamed at the top of his lungs and flew into his parents' room. He huddled between Mom and Dad like a little child; they couldn't calm him down. He was about 15-16 years old, if I'm not mistaken, at the time of the adventure.