These five videos are some of the hardest to explain. They're all caught on closed-circuit cameras. And they'll scare the bejesus out of you.

You've probably seen many a video on the internet that claims to have caught a ghost on camera. Some of them are hard to explain, while others are obviously fake.

There's only one out of these five videos that I might have any explanation for.

Also, it warns you at the beginning of the video to not watch too late into the evening in fear of nightmares. I watched this in broad daylight, and still found myself moving away from the desk cause, you know...it's dark down there!

What do you think?