I know about the nodding off thing people do.
The person in question is taking oxycontin. They’ll go to the refridgerator or stand before a cabinet for example. Then you notice eyes are closed and they start doing this low level growl/almost scream.
You’ll tap them on the shoulder and they just snap out as if nothing weird. Then at night, ugh. you’re woken to this sound midway between a moan and a scream. over and over and over. Go into their room and their just standing up up rocking back and forth and making animal noises.
Then also in night, they get up go to bathroom like every 10 minutes. Then you hear the moans and growls and yelps. Crack open door and their just standing there mouth agape, eyes closed moaning or slightly jumping up and down.
As you can imagine it’s very irritating to be around.