So, I can't count the times I've said to someone, "I need a nap. I just had one of those dreams that you have when you are falling asleep." If they say, "What are you talking about," I usually reply, "Oh you know, how you'll be falling asleep and then you notice the chickens that are walking around your room balancing on two-by-fours, and then you realize you're dreaming and it's probably time you get some sleep."
Sometimes they know what I'm talking about and sometimes they don't.
Well, I was reading about how you only dream druing REM sleep, and REM sleep takes hours before it begins, and I thought, no, that's totally wrong, because I get these falling-asleep preview dreams. So I did a little more research, and discovered that technically I'm hallucinating.
So that led to a fun evening reading all about hypnagogic (pre-sleep) hallucinations. Evidently at least one in four people have them. There was a lot of information on related neurological issues, none of which I have. No narcolepsy, no Parkinsons. (MS isn't mentioned. Besides, they started well before my brain had any issues. I remember when I was eleven or so: I was lulled to sleep by violent tableaus that played out on my wallpaper.)
I presented the findings to Gary, just so he knows I can match him in the dream game, and he scoffed, "Everyone does that."