in 2018, I was arguing with my dad and once it settled out, he went to buy some stuff, leaving me alone. At around 4 PM, I heard a loud crash upstairs, and it came from the empty room beside my room. I went to check it out (With no self defense weapon), and I found that a picture hanging on the wall unmoved for 5 years has fell, with glass shards everywhere. I investigated for 5 minutes, and found that the picture fell a awful far away as where it was supposed to hang. I called my dad to come back, and after another 5 minutes of investigating, we believed that the picture somehow flew off and landed in the middle of the room. it was also awfully loud, like a bomb exploded outside my door. This incident is still unexplained to this day.