When we were teenagers, my brother and I experimented with divining rods. We fashioned some out of old bicycle spokes, making two "L" shapes, and they worked with incredible accuracy.
One of our experiments included guessing heads or tails on a penny flipped onto a bed and hastily covered with a pillow. We guessed correctly 100% of the time (I can't recall the divining rods ever guessing incorrectly), asking the rods to, e.g., cross if the penny was heads. The one doing the guessing had to turn his back, and the one flipping the coin would hold the pillow in front and cover the pillow when it hit the bed, so neither of us would know the result until the pillow was lifted.
In another of our experiments, one of us would leave the room while the other would hide something. We invariably found the object. Once, my friend Tom---no believer in things paranormal---came over and we boasted to him our success with these two metal rods. Of course, he was skeptical, so I handed him a small rubber ball and asked him to hide it anywhere in the room.
I left, closing the door behind me, and my brother called me back in when Tom was ready. I held the divining rods and they slowly pointed to Tom. I walked toward him and the rods "exed" over him. I walked away and again the rods pointed toward him and crossed when I was near him. "Maybe they're picking you up because you were the last to handle the ball," I explained, lamely. Meanwhile Tom was giggling nervously.
I tried again and got the same result. Finally, my brother said, "Show him where it is," and Tom pulled the rubber ball from his pocket! Now, I concede that it is possible that I had subconsciously picked up clues from Tom and my brother, and that I used that info to make the rods point the right way. (Even if that were the explanation, you'd have to admit it's pretty impressive, since I wouldn't have consciously guessed the right location of the ball.) However, that still wouldn't explain our success with the heads-or-tails experiments, in which neither one of us knew the answer. I do believe that the movement of the rods is based on subconscious hand movements, and not by anything directly paranormal, but that our subconscious has at its disposal a vast array of information that our conscious minds could not obtain via normal means. The rods are just a device---a focal point---that anyone can use to obtain information beyond space/time/the senses.
One last thing that underscores that this was not just two kids fooling themselves: We continued experimenting with the divining rods for maybe a couple of weeks. Could have been shorter or longer. Their accuracy never wavered. Then we noticed something very odd: we had both developed, and fairly simultaneously, an odd feeling in the middle of our foreheads, precisely where the third eye is said to be. It was a sort of pressure or soreness that had developed gradually, and it was definitely not a headache. In hindsight, I suppose doing all of these experiments had given the third eye quite a workout! Because that's exactly what it felt like---the soreness of a muscle that had been thoroughly exercised.
We were a bit freaked out by this strange sensation and put the rods away for years. Curiously, I picked them up again when I was in my early twenties but didn't get the unerring results I had gotten when I was younger. Perhaps I had lost something. Innocence? Complete faith in these things? I don't know. I'll be 40 this year and wonder if I can tap into that source again.
So if you find someone picking through your trash for an old bicycle wheel, please be kind.