Hallucinations of things that aren't real.
The terror it can strike and horror it'll engrave in the mind.
When the most alarming part of being yourself is being able to watch yourself die...over and over and over..while not being able to do anything about it..ever...When the hallucinations of hanging from the roof become and look as real as the real life person in front of you. Watching your tattoos come to life and become actual wounds in your flesh. These cause the most fear in my life, sometimes you can't always tell if they're real or not.