Oh, seeing them isn't normal?
But seriously. Since I grew up in... eh, let's call it an "occult-ish" household, I have been very aware of ghosts, spirits, whatever. I have seen the psychic residue of those still alive.
When my mom, her boyfriend and I moved into this particular house, we got my room done first. So I told mom and Thomas to sleep in my rroom, I'd take the couch.
Some time in the middle of the night, I heard Thomas come into the living room. Well, I don;t sleep with my glasses on, so I couldn;t tell it wasn't Thomas until he leaned over me and told me quite clearly to GET OUT! I said, "Dude, it's okay, i'm not here to hurt anything." rolled over, and went back to sleep.
And that's a normal occurance for me. Seriously.