Sleep Hypnosis

Well I didn't think about this until just recently but I think I had a sleep hypnosis phase a while ago with my wife. I was lying down in bed pretty tired and talking to her, I'm assuming I dosed off when we weren't talking. But I clearly remember talking to her and mentioning "space bleachers" and she asked what I said and I with a tone of astonishment repeated "space bleachers!". It went on for a short bit and I remember just thinking how ridiculous that she didn't know what the hell space bleachers were. Then I snapped out of it and was confused about the whole situation. This happened another day like that week where I started talking about cats randomly too. Do you think I was going through a sleep hypnosis state?