When I was about 9 (I am 14 now), I used to play by myself alone. Both my parents had jobs so I would be left with a baby sitter. She used to tell me spooky stories that got me goosebumps.
But one night while I was alone in my room I saw this shadow, it wasn’t mine for sure. But I ignored it. But then suddenly I saw the shadow waving at me! I thought it was probably my little sister pulling pranks on me until one night when she was sitting next to me watching T.V. The shadow came back again. Well my sister couldn’t do it since she was right next to me.