The more you're around it the easier it gets. I never felt in danger. The only times I got freaked out was when I saw a full body person in drab older style suit walk into an elevator and disappear. I was alone in the building. Other time was first night in my old apartment and a beer can went flying off the counter and across the kitchen. This was 2am ish and no I wasn't that drunk lol
The beer can and some other stuff I like to chalk up to friends of mine that have passed on just fucking with me. It used to make me feel closer to them, like they were still around. I know weird. I lost a lot of friends at a young age to cancer, drugs, gang shit, etc.