Here's another that most people might have heard of.
"This man" is a myth that spread around the internet (and the real life world) for quite a while after a patient of a New York psychiatrist drew a picture of a man that she said has been appearing in her dreams. On several occasions he has given her advice but she's never seen him before IRL. The psychiatrist kept the picture on his desk for a few days, until another one of his patients recognised the man in the drawing as someone from his own dreams. In a few months after that, 4 addional patients recognised the man in the drawing as people they've seen in their dreams. None of those people knew each other.
< This is "This man".
Since 2006 to about 2015 (from what I get get from different sites) over 2000 people have claimed to see this man, all of whom are scattered across the globe.
There's many theories to this, some more credible then others.
Archetype Theory:
This theory is that this face is something that your subconscious that arises during times of hardship.
Daytime Recognition Theory:
Normally, we don't remember the faces we see in our dreams if it's just casual. So, when the person is awake, their mind forms an image of someone whom has a symmetrical face, normal features and it's just the most basic form of a persons face our mind can perceive.
Dream Imitation Theory:
This is the one I believe the most along with the daytime recognition theory, a mixture of both has then ended up causing this. This theory is basically just mass hysteria, once people started freaking out about this then others started dreaming about it and so the loop continued.
Dream Surfer Theory:
Quite a few people believe this theory, but it has the lowest scientific credibility. This is that "This man" can enter peoples dreams using psychological skills. Some believe that in real life this man looks like the man in the dreams. Others think that the man in the dreams looks completely different from his real life counterpart. Some people seem to believe that behind this man there is a mental conditioning plan developed by a major corporation.
Religious Theory:
Some people believe that this is the face of God, or of the Creator, or at least, one of his many forms. This is why the people who believe in this theory try to follow his indications and words he speaks closely.
No matter what theory is correct, still stands that the picture is unsettling for most people.
Posters where also put up across the world. Here's a couple from London and Milano:
So.. Have you seen this man?