Man, That's Freaky!

My middle son is a big horror movie buff. He can watch all the gore and not flinch. I, on the other hand, scream, squirm, and cover my eyes. This is why he and my husband have made it their life mission to drag me to every gross movie that comes out, so they can watch me watch the movie. And I go, because they get such a kick out of my reactions.
So...we talked the other day about what is really scary to you. I don't mean stuff like growing older, disease, etc. I mean those things that send a chill up your spine and freak you totally out!
Here's mine:
1) My ex, Satan, was traveling for business early in our marriage. He was driving home late at night and extremely tired. He said he was watching the road and suddenly thought he saw something move beside him. He looked over to the passenger seat and there sat a man, who at the same time he turned his head, the guy turned facing him, and it was his own face. In other words, he was sitting there beside himself. He said he screamed and caught himself right before he ran off the road. He said he guessed he had drifted off to sleep. That story still crosses my mind now and then and freaks me out.
2) When my daughter was a toddler, I was sleeping alone one night when my ex, Satan, was working the night shift. My daughter had a habit of waking up and coming into my room at night because she was scared or wanted water or whatever. This night I woke up and saw her outline standing by the bed. I asked what she wanted. She didn't reply. I said Honey what is it? She didn't reply. So I raised up and looked at her and she was gone. I looked all around and down the hallway, and she wasn't there. I immediately ran to her room and she was in her bed, asleep, all tucked in with her dolls. I freaked. I sat up all night with the lights on.
3) Taking a shower when I'm home alone gives me the creeps. I usually always wait until someone is home, or else I take the fastest showers on record. And no, I didn't really think the shower scene in Psycho was freaky, so I have no idea where this comes from.
4) If you ever saw the movie "The Grudge" or the previews for it, there is a scene where this man comes home to find his wife in bed, her face staring at the ceiling frozen in a look of total terror. As he approaches the bed, this little oriental boy with a very pasty bluish face, raises up behind the bed and lets out this howl like a cat. Ok, that absolutely freaks me out. Maybe that goes back to number two above.
Those are my top four. What are yours?