Way back when I was a child, I watched Mr. Wizard on TV. He had a neat experiment to demonstrate how touch can deceive. He took a ruler, and made a cardboard slide that goes around it. At one end of the ruler, he put a pin, and he attached one to the slide, so that he could vary the distance between the pins.
He got his subject to hold out her arm and he lightly tapped the pins against the inside of her arm, an inch apart at first, and asked her how many pins she felt: two, of course. He then decreased the distance until he got within the distance we have between sensory nerves in the skin. At that distance, suddenly one pin vanished, and the woman helping him only felt one pin. (he then went on to repeat the test on other parts of the body, such as the lips, to show that different parts of the body have sensory nerves closer together than others).
Also consider the fun experiment where you stand in a doorway and press your arms out against the sides. Spend a minute like this, during which your body is processing its tactile inputs and making its best guesstimates as to what your body is doing. When you step out, your arms rise. You end up confusing the sensors in the body which detect muscle length, which are a fundamental part of the kinesthetics that tactile input lets us use.
Many internal martial arts take advantage of touch's ability to deceive, allowing their opponent to overextend because their opponent thinks they're in one position when they're actually in another.
Finally, saving the best for last, why not just take the lesson from the best: Penn and Teller.