I have had many experiences with sober hallucinations. I've seen full bodied, ghost like figures (I don't believe in ghosts), I've heard voices and actions that weren't there, I've experienced tactile body hallucinations, sometimes with sounds as well. I think these things are common, more than people (NTs) are willing to admit, and that's why they seem so abnormal. If they are related to depression, like mine?, then they can and do go away once the depression subsides. PTSD is also another cause, I have (had) major depression and PTSD symptoms at the same time, rendering me totally out of commission and with daily hallucinogenic issues while completely clean and sober. Then there was the possible AS... so no friends to help me either, and really bizarre social efforts on my part.