My sweetie has lucid dreams. I would get home from work and she would be mad at me about something that I said to her in her dreams. It would take hours to clear up and at some level I know she thought I was spoofing her. Then one day it happened to her at work. She went to a coworker and started talking about the follow up to their latest meeting. The coworker let her go on a bit and then asked her what she was talking about. She is much more careful about this now.