Asking a DC if they are real

In an LD I had a long long time ago, I was in a classroom when I found out I was dreaming. I asked the teacher if he was a real person. He burst out laughing and replied, “No! I’m just a dream character!” . He found my question so hilarious that he kept on laughing for about a minute more. Anyone else tried something like this?

A few times. I get answers that cover the spectrum of possibilities, so I just stopped caring whether they are real or not. I treat them as respectable, expendable, sometimes unpredictable entities that may or may not be real.

I find your dream characters response to be quite hilarious though