I used to sleepwalk regularly when I was a kid, but it died down when I hit puberty. I also used to talk all the time in my sleep and apparently still do. And I've endured my share of "night terrors," most recently a couple of months ago. No fun.
John, what you describe sounds very much like a drunk thing. It was my misfortune to be affiliated for quite some time with a fellow who drank/drugged heavily and frequently would conduct arguments with strangers (while looking at me) in his sleep. And, god, the pissing mishaps . . . Again, no fun.