Sleep Paralysis - In Mexico, it is believed that this is caused by the spirit of a dead person. This ghost lies down upon the body of the sleeper, rendering him unable to move. People refer to this as "Subirse el Muerto" (dead person on you)
A reader writes: “I was given this photo by one of my paranormal team members. It was taken the day before the man passed away in his home. I’ve been trying to debunk it without much success. I would be interested to hear what others think.