Possibly true, unexplained mysteries ITT

Let me start this off with a few classics. Feel free to post both true and alleged mysteries.

The Bloop

http://youtube.com/watch?v=8-SbFiADSoY

http://en.wikipedia.org/wiki/Bloop

Very big, most likely very alive unknown thing creating this frequency. Freaky as hell.

http://en.wikipedia.org/wiki/Wow%21_signal

In the same vain as The Bloop

http://www.think-aboutit.com/Misc/philadelphia_experiment.htm
http://en.wikipedia.org/wiki/Philadelphia_Experiment
http://www.subversiveelement.com/CampHero.html

Who hasn't heard of the Philadeplhia Experiment?

http://en.wikipedia.org/wiki/Antonio_Villas_Boas
http://en.wikipedia.org/wiki/Hill_Abduction

Alien abduction, oh boy!

http://en.wikipedia.org/wiki/Valentich_Disappearance

Perhaps my favorite. An actual, documented mystery of an unexplained disappearance. Did the pilot crash? Was it a prank? Who knows.

Well many of you probably know this mystery that has been circling the earth for many years which is:

The Roswell UFO Incident

http://en.wikipedia.org/wiki/Roswell_UFO_Incident

A possibly real life exorcism of a man possessed by a powerful ghost

http://www.theexorcisms.com/real_life_cases.html

DeadApe wrote:I dont believe in any of these things, except possibly the bloop. We have only discovered about 10% of our ocean. But apparently its impossible for something so large to be living at the bottom anyway.

The Valentich Disappearance is the only one I really raise an eyebrow at.

http://en.wikipedia.org/wiki/Antonio_Villas_Boas

I like this one super mega king