So a couple of months ago i had sleep paralysis, i couldn't move (obviously) not even open my eyes and out of nowhere i heard a male laugh, I thought that it was my dad pranking me or something but suddently I felt a cold and scratchy hand touching mine, then the hand grabbed my arm and started to lift me up and after a few secconds my body woke up and was able to move, i checked my whole room and there was no one in there, i even asked my dad about it but he didn't had eanithing to do with the situation and i haven't had another sleep paralysis since then. Does anyone know why this happened?