Didn't really know where to post this, as it is a part of Lucid Dreaming.
What is the scariest or craziest Hypnogogic Hallucination You've ever had?

I've had one where I was laying on my stomach, and I felt something about the size of Gollum from Lord of the Rings crawling on my back, then it took it's nails and slowly, softly scraped them down my back, then hissed in my ear and scared me out of SP.