A sense of the unknown. Consider 'Fog. Whispers. Unseen danger.' The fog obscures vision, and the whispers suggest something that is not clearly defined. The unseen danger creates a feeling of unease because our imagination can run wild thinking about what that danger might be.
There were many six-character poems by Li Bai. The following are some examples:
1. Looking at the Waterfall of Lushan Mountain. Purple smoke rises from the incense burner in the sunshine, and the waterfall hangs in front of the river from afar. The stream flowed down three thousand feet, and it was suspected that the Milky Way fell from the nine heavens.
2." Leaving the White Emperor City in the morning ". He left the White Emperor in the clouds and returned to Jiangling in a day. On both sides of the river, apes cry endlessly, and the light boat has passed through ten thousand mountains.
3."To Wang Lun" Li Bai was about to set out on a boat when he suddenly heard the sound of singing on the shore.
There are other six-word poems, but these are some of the more famous examples.
I'm not sure specifically which '20 best six - word stories' you refer to. There are many collections out there. Some might be about love like 'Met you. Loved you. Lost you.' Another could be a sad one 'Birthday. Alone. No calls. No cake.' And there could be a hopeful one such as 'Struggled. Fell. Got up. Kept going.'
The six scary stories could be filled with all kinds of terrifying elements like haunted houses, creepy creatures, and mysterious disappearances. Each story might have its own unique setting and source of horror, for example, one could be set in an old abandoned asylum where patients were once tortured, and now their ghosts roam the halls.