The Mind Body Connection
Here is a great little practical to play with anyone who is skeptical about the mind-body connection (psychophysical link)
Make a pendulum from string and a heavy object Here is a picture of one I made out of a shoe lace and a child's toy. Then close your eyes and circle the pendulum in a clock wise direction. Then without changing anything in your body, visualise it going in the other direction. The pendulum will then change direction. It may happen slowly if you are not use to visualising. Have a go and see how you get on....