Supper Time Ghost

To make things a little more clear, I want to give a little background detail of the house that I lived in. The house was an older traditional-style Japanese house. The kitchen/living room area was on the opposite side of the house from where the bedrooms (including mine) were. I also was the only one on the side of the house because my Host Mother was in the kitchen cooking supper and the rest of my host family was out working late. The cat was outside too. My bedroom door was a fancy sliding door that was made of frosted glass, so I would've seen someone walk by. Also, the ceiling in the hallway leading to the other side of the house from my bedroom is kind of low (because I'm an unnecessarily tall Canadian hehehe).

It was a little bit before supper and I wanted to go and relax in my room. I laid down on my bed and started to reflect on how my day went. As I laid there, I got a strange feeling; it was a kind of excited, eerie feeling. I looked toward my door. I stared at it when all of a sudden, a black, shadowy arm from the ceiling, came down and knocked on the window of my door! I was flabbergasted! I went to my door cautiously and opened it, I looked up to the ceiling to find nothing there! At that moment, my Host Mother called me to supper. I ran to my Host Mother and told what had happened. She laughed at me and told me that I was just paranoid. Anyway, that night I had a little trouble falling asleep.

Any ideas? Or was I just hallucinating?