Okay it happens at my grandmas everytime I go to her house with out fail. When Im at my grandmas house I sleep to a radio on a low volume and i kinda "think" myself to sleep. It starts out as everything goes black like the light from my nightlight disappears then it starts to feel like Im falling. The first time it happened I tried to sit up once and it didnt work and then I tried again and ended smacking my head on the top bunk (that hurt too ). It happened the again next night I let it go this time and then all the sudden I stopped falling and then I woke up the next morning. Does this have anything to do with a lucid dream and if so what?