I was once in a state of sleep paralysis, which is the state between being awake and being asleep, and when I looked over to the chair by my bed I saw a man with a blue tattoo on his left arm. He was white with brown or black hair and had a thin mustache.
He was just staring at me, and I was staring back at him. Then I became fully awake, and all of a sudden the man had disappeared while I was still looking at the chair. But I had seen him clear as day in my sleep paralysis state. My eyes had been wide open.
And if he wasn't real, I wondered why I could remember so many details about how he looked and what he was wearing, and the fact that he had a blue tattoo on his left arm.