I have some of those stories, too. My theory is that there are two different things going on: A) dimensional mini-wormholes, B) house fairies.
Yeah, yeah, you can laugh, but here are two types of stories; you'll see the difference.
Type A:
My boss, who is an atheist, science freak, and a total nonbeliever in anything paranormal, told me -- after I pried if anything inexplicable had ever
happened to him -- this story: He and his ex-wife had a fight in the bathroom, and he got so frustrated that he grabbed a shampoo bottle and threw it
against the wall. After the fight was over and she had stormed out of the bathroom, he wanted to pick up the shampoo bottle... and it was gone. He
looked everywhere, and a full-size shampoo bottle should not be hard to find.
A friend of mine once went camping in the Arizonan desert and was sitting down to eat a watermelon. He scooped a little too deep with his spoon, and
the spoon got stuck and catapulted out of his hand. He said it was like watching the scene in slow motion: He saw the spoon fly through the air end
over end and then fall into a tiny shrub about 2 feet tall and 2 feet in diameter. He looked for the spoon for an hour and could not find it. There
were no holes in the ground under or around the bush, and the bush itself was a skimpy little thing.
It seems that in most of these stories, a certain momentum plays a role. It's either objects dropping on the floor or being thrown -- so speed
appears to be a factor here. Maybe it's random mini-wormholes that open up when a small body picks up a certain amount of speed? Just a thought.
Now for the other kind, Type B: Things disappearing from where you've put them... and sometimes reappearing.
I've had that numerous times. The most recent one was a small box with a locket with pictures of my grandparents in it that I really treasure. I was
sorting out some jewelry I had inherited from my mom; all the baggies and boxes with stuff in them were in a plastic bag. So I dumped the whole bag
onto the footend of the bed and clearly saw the blue box with the locket. But when I went to put all the stuff away again, it was missing. I searched
the entire bed, the floor, the floor underneath the bed, everything. Gone.
Now you can laugh at me, but I do believe in the tales that fairies like shiny things and sometimes take them. Legend says that if that happens, you
can ask them very nicely to bring the object back and it will reappear (if they feel charitable). Just don't get angry with them. So I said: "Dear
fairies, I know you like that pendant, but it really means a lot to me. Please bring it back."
The next morning, I found it under my husband's pillow. I swear I had been turning the entire bedroom upside down, I had even looked under the
pillows even though there was no way the box could have gotten there from the foot of the bed. And this was only one of many similar incidents.
It is also said that sometimes the fairies bring unexpected GIFTS if they really like you. Here's one of those stories.
One day I found a little box under a bedroom shelf (an open shelf, you can see everything under there). It contained a gold-colored angel pin with an
angel message and an angel bookmark. I'd never seen that thing before and asked both my husband and my then 4-year-old if they knew anything about
it. They both said no, and neither of them is a prankster by nature. The pin etc. was brandnew, but no one had bought it and no one knew how it had
gotten there. It seemingly appeared out of nowhere. I took it as a surprise gift from the fairies.
Call me crazy, but the next time your shiny things -- tongue rings, keys, jewelry -- disappears from where you put them, ask the fairies to please
give them back. You may be amazed how well that works.