Today I had a dream. I was in class where I and my classmate were chosen to be examined. Once seated in front of the teacher we got our questions. She accidentally saw mine and made a funny remark about it. I did not get it at first and so I just smiled in a general way. Since in real life she is used to me getting her jokes she immediately explained it to me. Only then did I understand it and had a good laugh.
How can I not get a joke made de facto by myself (even though on behalf of someone else) in a dream?