acura,
There is nothing wrong with you. You only thought your brain was telling your hand to move but when something like that happens, your brain is awake but your physical body is asleep. That's it. No ghostly stuff whatsoever. Happened to me also. I woke up and can't move my hand. It's just hanging there lifeless. Can't move, can't anything. It's probably due to bad sleeping position.
If it makes you feel any better, I talked to a monk who deals with funerals and she said that ghosts cannot enter your house. It is like a spiritual law set by the Gods or "san sin" or etc. that if the ghost is not related to you and have not stayed with you for very very long time while alive, they can't come into your house. So usually, even if ghost do come back, it'll probably be someone really close to you who has passed on to the next world. Even if your really close ones do come back to your house, it's only because they still love you or miss you and wants to see you. Fear not for they are in a different world and cannot harm us, so to speak. Else, call BlackSamurai and he will come with his Black Holy Samurai Sword and slash up the unwelcomed ghosts in your home. After slashing the ghost, I will come with a wok and hot oil and I'll cook for y'all, "yau char kwai"
Oh, and do let me know if y'all want to eat that with porridge or bak kut teh.
hahahahaha
BlackSamurai,
Wah, you preparing bak kut teh soup ar? So early still awake. hehehe Or are you making dim sum? hehehehe