Before my wife and I were married 11 years ago, we had to attend a marriage retreat in Estes Park, Colorado. (She's Catholic, I'm not, and the church required either this retreat or a once a week course for 8 weeks).
Anyway, the group (probably 15-20 couples) had to stay in a dorm, segregated of course-don't want any of that pre-marital hanky panky going on you know.

I was in a room with five other guys and one of them, who used to drive tanks in the Army, said he needed to warn us that he doesn't talk in his sleep, but
screams in his sleep.
Sure enough, about 2 in the morning
...."HERE THEY ****ING COME!!! GET READY!!!! OH MY GOD!!!! ARE YOU OK? AHHHHHH!!!!!"
Scared the hell out of all of us. Someone turns on the lights and he is in bed asleep. One of the guys wakes him up and asks if he's alright. He says he is. He asks if he was screaming. Somehow we eventually go back to sleep.
Next morning, the guy doesn't remember any of it.
I've often wondered how well that marriage has gone over the years.