I share the suspicion that the OP may be in need of some mental health services.
I lived in a downstairs apartment once that had zero soundproofing or insulation. Some new neighbors moved in and I was sure they had a couple Great Danes or something. Sounded like really big dogs up there. I could hear them stomping from room to room, and if someone came to the door, I could hear the pitter patter of enormous dog feetz pattering over to the door. I love dogs and I had one myself so I was kind of looking forward to meeting these dogs on the dogwalk nearby.
One day, the girl had taken her dogs out and locked herself out accidentally. She banged on my door and asked to use my phone to call her BF to come let her in. She had a tiny Chihuahua in each hand. I asked if those were the enormous Great Danes I kept hearing upstairs. We had a good laugh.
Lesson: Wooden subfloors conduct sound and make things sound a LOT louder than they sound when you are in the same room with those sounds.
Another time, same tenants upstairs, I was entertaining a friend (Girls’ Chick Flick Night) and heard the guys upstairs stomping around. They weren’t really stomping, it just sounded a hell of a lot louder from below. Anyway, I heard this terrible crash, like someone dropped an entire cabinet of… something breakable, followed by a very loud, “Ah FUCK!”. Then we heard this weird crinkly sweeping noise. Whatever had been dropped was clearly being swept up. My friend and I spent the next hour making shit up in speculation about what had happened up there.
A couple weeks later, one of the guys stop by to introduce himself. Seizing the opportunity, I asked him, “Hey! I heard something crash last Friday night… What was it? My friend and I spent way too much time trying to figure it out.” He laughed and told me that he’d tried to use Corningware on the stovetop and quickly realized that you can’t do that because it had shattered. Ah. Crash, and then sweeping noises explained.
I was really happy to move out of there. I realized that the upstairs neighbors had about zero control of what I could hear from below. I never once suspected they were following me around dropping Corningware just to disturb me. I had visited other people who lived in upstairs apartments and noticed that you can’t hear shit from below, but you can hear everything from above.
I feel a little sorry for the OP’s neighbor, who probably can’t even hear the screaming at the ceiling from below.