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.
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.
He sat alone in the old house, surrounded by memories of his family. Now they were all gone, and the silence was deafening, crushing his spirit bit by bit.
One common theme is loss. For example, 'The old man lost his wife of 50 years and now the days are just a long, lonely wait.' It shows how the absence of someone important can create great sadness.