sounded so real can it really happen?
It was old hag syndrome. But to the extreme. I've heard of cases like this but not quite this severe and usually at home in bed. But this is extraordinary.
I think it may have been the ghost of that young girl, and she was getting what she wanted for revenge on the boyfriend. She may have been a ghost killed by her boyfriend; she may have reverted to the real body state; a corpse!