Had (apparently) a sleep hallucination (different from a night terror) and saw a black ichor monster with a crown made of flesh. It ran at me all herky jerky when it noticed I was awake. I screamed and put the blanket over my head. My mom woke up and ran into the room. It was gone.
Looked as real as real life, just a few feet from me. It was seamless with real life.
20 years later and haven't experienced anything like that before or after.
Mom later said she saw a moving shadow in the room before she turned on the light.