What's the scariest dream you have had?

I have had my fair share of scary dreams, but last night was the worst. In the dream I was lying on a bed in the dark, I look towards my left and there is a tall lady standing there. She had a white-yellowish hue and is just staring at me. No talking, simply watching me.

Next thing, she falls on top of me and enters into my body like she was possessing me. Suddenly I woke up in complete fear.

I would love to know your scariest dreams. Let's go!