There was a cat. It chased a mouse. The mouse escaped.
Sure. Once upon a time, there was a little bird. It was a very very short story of a bird's day. The bird woke up, flew around a bit, found a small worm, ate it, and then went back to its nest to rest.
Well, a very very very short story could be something like 'The cat jumped. It landed. End.' It's extremely concise and gets to the point quickly without much elaboration.
A man saw a flower. He picked it. It died. Simple as that.
Focus on one key idea. For instance, if you want to write about hope, build a short story around a single image like a flower growing through a crack in the pavement.
Just focus on one simple event. For example, 'A boy dropped his ice cream. He cried.'
The characteristics of a very very very short story include simplicity. It doesn't have complex plotlines or numerous characters. For example, 'Bird flew. Sky was blue.' Also, it can be highly suggestive. Since it's so short, it makes the reader think more. Like 'Light went out. Silence.' It makes you wonder why the light went out and what the silence means. These stories are often about capturing a moment or a basic human experience in the most minimal way.
A skeleton walked into a bar and said, 'Give me a beer and a mop.'
Sure. Once upon a time, there was a little cat. It liked to play with a ball of yarn. One day, it lost the yarn. But it found a new friend, a little mouse. They became friends and played together.
Once upon a time, a boy found a key. He opened a door and saw a magical world.
A guy goes to the doctor. 'Doctor, I keep thinking I'm a moth.' Doctor says, 'I think you need a psychiatrist, not a doctor.' Guy says, 'Yes, I know.' Doctor asks, 'So why did you come here?' Guy replies, 'Well, your light was on.'