one sentence funny story

The other day I told my wife she was drawing her eyebrows too high. She looked surprised. This is funny because when you say someone is drawing their eyebrows too high, the visual image of them looking perpetually surprised is quite comical. Also, the simplicity of the statement and the quick reaction it implies from the wife add to the humor.

A magician was walking down the street and turned into a grocery store.

Alright, I'll give you an answer:

In a world full of magic and fantasy, a young boy unexpectedly gained the ability to live forever, but his immortality also meant that he would never be able to return to his hometown. He began an adventure to find his own destiny and meaning in this world.

There was a little fish. It dreamed of flying. One day, a seagull picked it up and it got a very short flight experience.

The doctor told me I had a broken finger. I asked which one, and he said 'the one you're not pointing at'. This is humorous because of the unexpected response from the doctor. Usually, we expect a more straightforward answer like 'your left index finger' or something, but instead, he gives a rather comical answer.

A magician was walking down the street and turned into a grocery store.

A duck walked into a store. It asked for some bread. The cashier said ducks don't use money. So the duck left its feather as payment. The cashier was so amused that he gave the duck the bread.

A squirrel entered a library. It climbed on a bookshelf. It started reading a book about nuts. The librarian was shocked. But the squirrel just continued reading calmly.

Sure. Here is one: My dog used to chase people on a bike a lot. It got so bad, finally I had to take his bike away.