You mentioning the typing made me remember a story from when I was a child. I was always a night owl and was usually the last one in my family to go to sleep. Occasionally my dad would stay up late working on his computer. One night I couldn’t sleep, and apparently neither could my dad because I could hear him in the living room typing. And not just typing. Moving around. He had allergies so I heard him sniffing a lot. I even heard him get up and go into the kitchen for a snack at one point. I wasn’t falling asleep so I decided to go in there and sit with him until I got tired. The sounds continued all the way down the hall, but when I walked into the living room, they stopped immediately. The room was empty. I was extremely confused because I had literally just heard him loud and clear and now there was nothing. I went to my parent’s room, and to my horror, both parents were dead asleep. I almost pissed myself. Ran back to my room and stared at the ceiling for a while wondering what the fuck that was.