Someone give me a good explanation for this so I can go to sleep at night.
OK, we have an old house with one of those setups where there's a front room and a family room combo, with an open passthrough in between them, so it's sort of one big room, but divided into two parts. My kid and I were in the family room part, in a chair that is right next to the passthrough, and has its back to the front room. We're sitting there, reading a book, when right behind me I hear a fairly loud noise that sounds like something metal falling from a height, onto the wooden floor. Right behind me. We both look up and were like, "what was that?" So I get up, and the front room is empty. We just put out the Christmas decorations this weekend, so the front room has been straightened and polished and all that jazz, and there's nothing on the floor at all. Not even a random toy or anything. I look all around, under the furniture, under the Christmas tree, nothing. I look all around on top of things, to see if any decoration has fallen down, everything seems to be intact. So, I figure the sound must have come from farther away than it seemed, so I go in the adjacent hallway, the stairwell, the dining room...nothing. Nothing fell to the floor and made a loud clattering sound.
So...what was it? Please give me a logical and rational explanation for this. I'm begging you.