Follow-Up:
my ex boyfriend had this, i saw it, just once. it was like something was attacking him, pulled him right out of bed, and looked as if my boyfriend was pulling something off his neck. i didn't see anything but him struggling, he jumped right back into bed as though nothing happened. then said to be 1 minute later, what the f*** just happened. scared the shit out of me. its a nightmare, sometimes you wake up in the middle, end, or sleep right through it. you prabably sleep walk too. read up on nighmares or see a sleep specialist.