Sure you didnt wake up while dreaming? thats happened to me before and i looked into it apparently when your in R.E.M. sleep your body releases a chemical to paralyze you so you dont act out what your dreaming and potentially endanger yourself (sleep walkers lack this chemical) if a person were to wake up while in R.E.M. sleep they will experiance parts of their dreams in the waking world as well as be paralyzed or as some may say frozen in fear. What happened to me was I was dreaming about aliens and I woke up and saw one of those bastards right next to me and I couldnt move at all. after a few minutes of being awake I started to be able to move around and everything returned to normal. The mind is a scary place indeed :P
Anthony Solvedt Sleep Paralysis, it was mixed into. I woke up saw the tv. tried to fall back asleep. woke up again and couldn't move. that happens to me occasionally and i quite enjoy it for some odd reason.