There’s someone in my building who lives in the attic, they make sudden random movements, hit themselves, say bizarre things and swear for no reason, their mood can switch from happy to sad and back again in seconds, they speak to people who aren’t there (people in their head), and sometimes they suddenly act like they aren’t sure how they got where they are and their memory skips random things.
The worst thing is learning to cope with knowing that they are me.