Hello. I'm looking for a purely physical explanation for an unusual event that occurred in my home. The circumstances are humorous and creepy and cause for speculation concerning the paranormal. However, I believe we have identified the true cause of the phenomenon and want to vet it against scientific principles. Thus, I'm posting here to see if anyone can help affirm our hypothesis. Essentially, a small child ran into the home, stopped and proclaimed there was a ghost in our house. I told her there were no ghosts. Right as I said that, we heard a loud sound my husband likened to a car striking the house. (I myself suspected a large, wooden bookcase had fallen over.) Then, a framed photograph flew nine feet across the room and landed on the floor. It's trajectory meant it flew at a sharp diagonal, which no one would expect. Pictures have fallen off the wall before but have always dropped straight down to the floor. This occurred in the living room. Roughly four hours later, a wooden curtain rod crashed to the floor. This rod was hung in a room directly behind the living room. The rod ran parallel (just inches away) to the wall holding the flying picture, and its ends attached to two walls perpendicular to the wall holding the picture. As a result, we suspect that tension in the rod was building up for some time due to the weight of clothing it held. Further, we suspect this tension transferred through the wall and provided the energy needed to slingshot the picture across the room. Is this a viable proposition? Please let us know. While we are leaning to the rod tension theory, we are uncertain as to why such a loud noise precipitated the picture flying and why a similar phenomenon didn't obtain when the rod fell multiple times in the past.We also wonder why another picture of identical weight and size hung on the wall--by nothing more than a thumb tack, and only an inch or so away--was unaffected.