Well, me thinks that there certainly could be a scientific explanation for those cases and am quite surprised that Joe is posting this. Thought he was more interested in science.
Nonetheless, Happy Halloween, "Let the screams begin!"
This one is worth watching: The guy is speaking in Spanish, he is in a cemetery with a camera, sees a girl sitting by a tomb and asks what he name is, she looks at him, he takes off running like crazy, calling himself an "idiot" and asking for help. lol
Watch it:
http://www.youtube.com/watch?v=YfLGTsHTlNs
Can't Miss this One, it will clear your doubts:
http://www.youtube.com/watch?v=QfZItov1BUo&playnext=1